IF you have everything in writing, I think it could work, but what you would want to do is split the first clutch in such a fashion that he gets half the profit AND gets back his share of the investment, and then YOU own the snake in full. That makes his share an investment rather than partial ownership of the snake, per se. If it works, you can both do the same thing again and get HIM a snake. But put it ALL in writing, and have backup plans in case she doesn't lay or something else goes wrong.