Fish, I gotta tell ya, I don't think there's anyone who can give an actual answer to your question other than you, and your "potential client" (who we'll call PC).
What are PC's desires, and expectations? Does he expect to see deer if he's giving you money? Slippery slope.
What's he willing to pay? I guess in reality, the answer to your question is "charge what the market will bear"
Find out what he's willing to pay, and what he thinks are reasonable expectations in return.
Or, you could do it for free, for the good of the sport.
But then again, you only get so many weekends per season, and your time is valuable, right?
Do you even want to be bothered with the responsibility?
Lots of variables here.
I have no idea what leases go for, what guided hunts go for, don't even know where to look.
Reading my own post I realize I'm no help at all, just asking more questions than answering anything.
What do you want to get out of the weekend?