The biggest problem is that you're looking for way too much for what effort you personally have to put in. The goal to making a game with prebuilt engines isn't to eliminate all of your work, but rather to help put your work to better use in development <_<;; What you're asking is for someone to pretty much code your project for you.
Honestly, if the starting post is correct in that you stated you know a lot about gamemaker, none of those obstacles should be a problem for you. Especially fairy movement.
