I like your idea! So is it going to be real-time combat, but with RPG type stats or something? I think your goals sound reachable, and it also looks like it'd be easy to leave some of the stuff for later if it's too much work. Looking forwards to seeing your progress!
Also, I read your post in the intro thread, and I also like Ghost Trick and Ace Attorney! Which Ace Attorney games have you played? :3