You're definitely gonna need a reputable escrow, and some pictures...

You'll definitely want to make sure you're WELL within the laws of the country you're doing this in, I know in certain places there are very specific laws regarding BTC-FIAT.

But if you can fit within laws, and provide a service that does some sort of revenue sharing of the fees, I think that would potentially work well.

Thanks for taking the time to post your story.