Reshape the entire industry to be a decentralized/house-edge-free form, where any one player has a net 0% gain/loss outcome over time. Regulate what bets can be placed and their payouts so that winners win less amounts and losers lose less amounts (i.e. you don't get wiped out).
It will feel like gambling, but overtime is no different than coin flipping for lunch money with a coworker every day. Essentially math away the "house always wins" part.
Thus, your proposal might actually work, except what's in it for the rubes?
A problem is infection. As Sports Betting is more legal and profitable, Fantasy Sports gain more Sports Bets and pseudoanonymity and lose some of their community spirit for "micro-transactions" and other "extreme gamification" and the line between each blurs. (Including to the point where groups looking for one might be easily confused into doing the other.)
I idly wonder if there is a way to shore up Fantasy Sports against the tide of Sports Betting profit.
I think you could raise money and then sustain a lean business.