Yes on offering to help pay for the food plots but I would also ask that my name be on the lease as half of lease as I paid for that. Yes I would pay half of that.
If your buddy balks at that - then I would be careful. You could be putting money into a food plot that you might or might not get benefit of using. He may be using you for his own means. I would ask that it be in writing.

Just me though as I have been there before.
JW