Let's say I want to make a movie funded out of my own pocket, for x amount. Maybe I have friends and family kick in half of that in small amounts, but not as proper legal "investors" but just by a criteria I define such as a promise to pay them plus a percentage if the thing sells. So someone likes the finished movie and wants to buy the product for x amount a year later. Do you foresee any problems that would crop up making a movie this way? Or have any of you done this?