So in other words: "I have enough web dev skill to build a site, and can see where Kemono needs improvement but don't want the legal risk of making my own site"
With that said: you COULD (should!) offer your skillz to Kemono and help them rebuild, improve & optimise the site. You have the knowhow to help, and help is exactly what they need
. Plus, unlike Yiff.Party, the Kemono admin is communicative, and not the kinda guy to poo in your mouth if you have "Ideas on how the site could be better run". Go and join the cause. Go on my son! GET IN THERE!