Your conditions are a translation of saying that if a profit occurs, you have half of the profits, and if there are losses, the other party will bear it, right?
I don't see any commitments on your part, you can develop your idea a little by offering a collective investment. You and members of the forum manage a multi-signature address, let's say 3 out of 5, each one deposits 100, where the grand total is 500 dollars, if a profit event is shared and if there is a loss it is shared as well. amount can be increased if confidence in the parties increases.