Maybe try to focus on one model in beginning, to make yourself easier job going to market than proceed with three models. I don't know much about your target audience and why you want three models (only I like your idea, but my vision here is extremely limited) but believe me you will have more then enough challenges on one model and by the time you have feedback from customers you will gain some traction and have more than one good idea how to improve product. Even if you have resources to make three models, maybe you can direct this resources to make prepare some good game, to make product more likable, playable etc something that could help your project in different way...Just an thought...