Considering that we can convert 1 more into 10 chakra learning jutsu should in many case be more economical then learning charms. For example the substitution technique is a very good defense and only costs 10 Charka so one more.
Doubt that.
There is a reason why you don't see Substitution spammed much in serious fights, as opposed to techniques like Shunshin. There are things that jutsu do better than Charms, especially at the lower levels; Water-Walking for example is a basic example.
But when charms get going, they go IN.
Besides, we favor fuinjutsu.
Strength of a Hundred is a chakra storage seal; pure fuinjutsu, no medicine.
Your options are pretty clear.
Max Fuinjutsu and Occult to 5.
Buy
Discerning Savant's Eye(E2,Linguistics 5,Linguistics Excellency prereq) and
All-Encompassing Sorcerer's Sight(E2, Occult 5, Spirit-Detecting Glance prereq). Find Tsunade and bet her that if you can replicate it in a week, she'll become Hokage.
Then go make your own. With blackjack. And hookers.
Return her to Konoha. Flex to your friends.
Proceed to dodge assassination teams from Iwa till they run out of volunteers.
Self-Initiation into Sorcery is going to be difficult.
But worth it.
Even Terrestrial Circle sorcery, with such basic spells as Infallible Messenger ad Stormwind Rider, is very much worth it.