Its a bum deal for you imo.
1. Any gain in yield you get you have to give him aka 25% of what you end up with.

2. You take all of the risks.

3. You pay for everything including the electric.
So in all reality you are the losing party as you give him all the extra weed,you do all the work take all the risks pay for all the extra nutes for bigger plants grown under 8oo watts and you pay the extra electric costs.
Bad deal in my opinion.
