Harry does if I recall correctly get just such a thing from Hagrid, the Mokeskin pouch. Hermione can also make something very similar as we see with her beaded bag, which she does actually store the Sword of Gryffindor in at one point.
It's always nice to have a Bag of Holding. The particular timing with the one that Hagrid gives Harry in canon comes later, but it also suggests that, one way or another, it was indeed possible to do such that it could perhaps be done at a different time. Whether Hagrid happened to give Harry a pouch that he himself already had laying around somewhere or bought the thing, he did it. It's not impossible that Hagrid picked up the pouch somehow at some point between the current time and later, but regardless, they are indeed a thing that exists. Getting one
somehow would stand to be doable and probably simple. Hermione's own similarly later and similar item is suggestive.
Hermione is a very good student, and there's no telling just how easy or difficult her bag was for her to make, but all the same, a very good student was able to whip up a bag of holding, and within the setting context, it doesn't come across as at all unrealistic that that's a thing that could happen when the Wizarding World seems to be rather fond of things that are bigger on the inside for it just being quite handy.
That then also presents some intriguing possibilities. Taylor has already voiced a desire to remake her costume. Just what could she end up coming up with here, with the possibilities available to her? She's avidly grabbing for information and has plenty of connections that could be quite relevant in giving her further information. If she gets ahold of magical spiders and turns out to spin up an acromantula silk costume or whatever, maybe makes a point of getting it magically treated and enchantments of whatever sort worked in,
and just carries around with her some cavernous absolute nightmare of a doom hive in her pockets... well that just ain't fair.
Taylor can do a lot with pockets that are big on the inside. She could get them, too.
A thought occurs to me that we haven't discussed what one particular character will think of Taylor marrying Harry yet. Hagrid is whom I'm talking about of course. Personally I think he'll enjoy her, after all she'll want to know all about various magical creatures so that's an easy positive in his eyes, but more than that I think Hagrid will see that Taylor is good for Harry. Canon Harry is very prone to being broody, and Taylor is unlikely to let that behavior continue for very long. Or am I characterizing him incorrectly.
A further point towards that, too, Taylor is conscious of how her relationship with Harry affects her relationship with others. The interaction with the Dursleys just last chapter serve up a straightforward example of the dynamic; Harry didn't like them, so comporting herself similarly was an easy way to ingratiate herself with him over something that she didn't mind doing and was very convenient, because she could just be Skitter at them and Harry would indeed outright see that as a good thing. Similarly,
Nymphadora isn't currently in a hospital or nowhere to be found because that would just be very impractical and make what she needs to do awkward and difficult. Hagrid stands to fit into things similarly.
Harry likes Hagrid and Hagrid likes Harry. It'd be convenient, then, if Taylor at least didn't not get along with Hagrid. As it stands, though, Hagrid is also likely to like Taylor just on principle and perhaps surprise her just generally being a very decent sort, and even a vague mention of Hagrid by Harry or anyone else is liable to leave Taylor under the impression that Hagrid is just every so useful towards getting all kinds of goodies. In Taylor's position, everything points towards a very good relationship, easy and desirable for a multitude of compounding reasons.
Actually this is not on wizards fault. This is because they are British.
Pre 1971 one British coin money was divided into:
twenty (20) shillings per pound.
The shilling was subdivided into twelve (12) pennies.
The penny was further sub-divided into two halfpennies or four farthings (quarter of a penny) To make it more easier it looked like this:
2 farthings = 1 halfpenny
2 halfpence = 1 penny
3 pence = 1 thruppence
6 pence = 1 sixpence (a 'tanner')
12 pence = 1 shilling (a bob)
2 shillings = 1 florin ( a 'two bob bit')
2 shillings and 6 pence = 1 half crown
5 shillings = 1 Crown
20 shillings = 1 pound ( if a coin) or quids (if a bank note)
21 shillings = 1 Quinea (a coin)
That... is a
deeply misrepresentative take on historical British and English coinage. Yes, there's a whole bunch of different coins that divide up all sorts of ways; that's the
point. From a
mathematical standpoint, it is extremely convenient, for much the same reason why the ancient Babylonians were enormously influential in the advancement of it to the extent that a great deal of modern mathematics
still use what they pioneered several thousand years ago. Highly composite numbers are just really, really convenient for counting.
Any sort of talk about all the different names being overly complicated senselessness is rubbish from people who take one look at something unfamiliar and decry it as hard because they aren't familiar with something unfamiliar, and
infect pervasive misconceptions repeated by people who had the misfortune to presume that others would be vaguely reasonable and sensible and knew what they were talking about, much the same as with people complaining about chopsticks or just about every child newly faced with a bicycle sans training wheels.
Incidentally, Lindybeige over on YouTube made a video diving into the particular topic:
Rowling made oodles of money writing an immensely popular children's book. In that respect, she is a very successful author, and reflective of her studies and ambitions towards that. She is not a mathematician, and what she wrote reflects that. Wizarding currency is just a complete absurdity.
Unfortunately for Taylor, however, she's probably about to have to deal with that. A
lot. She's being forced to jump headlong into a small-scale war on short notice, and she has a whole crapload of money to use for it, which is great, but, well, she has to
use it. The combined Potter and Black coffers stand to be ever so convenient for financing her/her side's war effort, so all of that is pointing towards being her problem.
It does raise some questions as to just what all she might spend money on, though, and how. Some items or services could potentially attract undesirable attention to acquire certain ways, regardless of how useful such purchases might be. Others, though, could perhaps look thoroughly unremarkable and practically invisible in the backdrop. Hogwarts could offer a very convenient cover, potentially, with things like a great many common potion supplies looking like something that could be expected of a student, but not actually used for purely academic purposes, and any allied staff buying on Taylor's/Dumbledore's behalf with her money could unobtrusively get away with a laundering whole hell of a lot.
Combined with services apparently being such that it's entirely possible to get a top of the line racing broom delivered by owl and Harry and Taylor having house elf assistance on tap if desired, even completely discounting any further participation from others, I should think that the two of them will be able to get there hands on a great deal that Voldemort and his lot would really rather them not.
