A couple things here:

I get a kick out of Red, repeatedly trying to compare this to a financial advisor/investor. That is funny as shit!! I think a better and closer comparison would be to a drug dealer. Dealer borrows money. Buys a shit load of drugs. Spends the next couple months re-selling drugs. And then returns the money borrowed and splits the profits with the "investor".

There is another funny part to this. These people...these "clients" are gamblers. They are degenerate types that like to bet on sports. So Red is asking them to turn their money over to him, while HE bets on the sports. So they sit there not knowing if they have action on a particular game or not, which is the whole thing they like to do...wager on sports.

Now maybe he can find someone that would do that, for the promise of a good return IF Dietz wins. But it is weird. Its like asking a guy that likes to smoke pot, well how about you give me the money you were going to spend on pot and watch me smoke it.