question RE: backing deals

[riverboatking]

ok so i've been playing the 20-40 no limit at commerce pretty regularly and there is a guy there who loses quite a bit, but is really really wealthy.

he has watched me play and last night he approached me and asked if i would "play for him".

he wants to put up all the money and split the wins 50/50, eating any and all loses that may occur.

and he wants me to play in a 50-100 blind no limit game.

i've been beating the 5-10 at the bike, 10-20 and 20-40 at commerce, consistently, so i don't really need to take the offer, however it is tempting seeing as i have a chance to play in a big game with absolutely zero risk.

just wondering if any of you have any experience with, or thoughts concerning backing deals.

ps. don't worry about talking to me about anything other then the financial EV of the decision, as i'm not worried about the business dealings between us, my question is purely in regards to whether the deal is a good.
he already made it clear that i would have full control of when i played, for how long, etc...