always have in hand downgrade things, dont be afraid of cutting rss from where you consider, as well changing from 3d to 2d could be more of a blessing than a burden or a downgrade for the game,
for where you could found someone to work i could not tell you much, but if you really want people to work on what you want to do, be direct and honest with your posts, "i need these people to help me with this" clear and simple whether money man, i mean its touhou, many youngers and not so youngers want to make projects with touhou girls, because its easy, you dont have to pay anything and it gives good visibility, but you have to be clear and direct, people will appreciate that, even better if you can describe rolls like "need a level designer, someone that has played the original games got some time in the comunity and can help us with the designing of our levels and characters" just as simple, trust me, if you make your posts very clean, clear of what you want, even better than the payment people will aprecciate something more concrete, that you show them you know what you want to do and how, that will help you atract more honest people that would really help you...
also, bro this is not the 2000s, i hope that you were just not thinking on get in touch with people just in this threat, i mean if you want people to help you look for other groups of developers on reddit discord look in other hubs that are not for touhou but for development, or even if its for investors xD unlikely you will found of them here, we struggle with sustening our own shrine

consider a kick starter, but yeah you will need more than just 3 scale model so consider that too, work in your inpretion... well good luck man...