1) use your head to do your thinking because if it's near and dear to your heart that will just cloud your judgement

2) it seems like a viable niche industry for its own networking iste

3) you dont have domain knowledge to build a site for this niche

4) it sounds like you need to use your 1500 existing members to rally behind the community and go out and help you find someone who can make this work.

5) have you considered traveling to nyc, hollywood, i dont know, wherever modeling is big, setting up some meetings and trying to sell your idea to the highest bidder?