Hmm. You seem to believe rather a lot of things then. You should be upfront about this sort of thing in discussion, if you're just going to respond to most things with "I don't believe that is the case." and doggedly insist upon your opinions being axiomatically correct.
First of all, don't be an ass. It's uncalled for. Do it again and I won't bother discussing anything with you.
If you had presented evidence that any of my assertions were false and I just went 'lalala can't hear you' you'd have a point, but you haven't bothered to do that. If you have any evidence to present I'm happy to look at it and re-evaluate my positions if necessary, because I have intellectual integrity.
But you didn't do that and told a lie about my unwillingness to listen to evidence, and I find that personally offensive.
Furthermore, let's examine these supported 'axiomatic' statements you seem to have such a problem with.
"Hiring assassins against another clan poses an unacceptable risk of Hiashi getting caught and executed for treason anyway. Possibly with the rest of the Hyuuga. It wouldn't be hard to get caught."
While we haven't seen a statute explicitly declaring it illegal for one clan to murder or make war on another clan in leaf, I would be deeply surprised if one did not exist given the comprehensive nature of the rules we have seen. Outlawing murder is pretty much the first thing most polities do. Further, we've seen that Hokages have vast authority. It is not a stretch that declaring treason and punishing treason with death is well within that authority.
"I don't believe mission providers have any choice over who accepts missions."
So far every mission we've seen went to the first ninja to accept it. Perhaps they could demand particular people if those people consented. I don't recall an example in the story of someone trying. Demanding that anyone but particular people do something seems like the sort of thing that might annoy the Hokage and get overruled.
"Attempting to coerce businesses in this way also risks the coalition against Hiashi retaliating by making it clear they won't do business with businesses that do business with Hiashi. Hiashi's leverage by threatening to take his business elsewhere unless businesses do what he wants has limits because Hiashi's business isn't the only business around."
This is pure explanation. There's no bald assertions here.
"I don't believe clan heads can order the Tower's administration around. That's the Hokage's remit, and he'd be free to ignore any allegations he likes and even make a judgement against Hiashi for spurious claims that waste the Tower's time."
This has been covered in the story. The council elects the Hokage, but then the Hokage runs the Tower administration. Hiashi can't issue orders to Tower departments if he's not Hokage.
"And I have no idea how you think he'd repossess a house without him both holding the loan on it and them having defaulted on the mortgage. That's not how that works."
The explanation for this statement is right there. To have a right to repossess something you conventionally need to be the holder of the secured loan and the borrower needs to have defaulted. A third party can't do it, and they certainly can't do it just because they feel like it without any default having occurred.
I'll be blunt, I think you owe me an apology.
For example, Naruto could wage economic warfare on any clan by underbidding them for all missions of the type their shinobi are suited for, crushing their conditional benefits and thus strangling their income.
Could Naruto complete missions ranging outside the Leaf with just clones? I'm not sure that would be workable. Maybe some mission types, like delivering things, but probably not anything involving combat. While potentially effective in numbers clones have the popping problem if they take any hit at all.
And that's assuming he didn't run into a range limit, I'm not sure whether shadow clone has one. I can't find anything on the wiki about it or clone range limitations in general but I feel like it's come up at some point.