My usual mode of collaboration with others is like this. If the profit you expect from me in a game is assumed to be 5000U, then I will pay you 5000U. If lose the game, you will compensate me with 5000(i paid you before)+5000 * 1.3=11500U, and all transactions will be made using escrow to keep ensure the fund security of both parties
This doesn't look clear and wise to go into in the first place. If a player who is betting under you loses, then he returns the money you initially paid him? Can you listen to yourself?
I'm not sure you are definitely going the right way. Moreover, you are just a newbie and would hardly get that kind of investment and oblique exercise you want someone to embark on.