Are you going to be getting rent and then some? It would be kinda silly to let someone have an illegal commercial grow in a house you own and not get paid for it. People growing in rented houses fuck shit up a lot of the times. And even if they don't fuck your house all up, like people said already there is a chance of you having to deal with some headaches, regardless if you're getting paid or not. But if you're getting paid from criminal enterprise you are part of the criminal enterprise. Now there's a chance of jail and a higher chance of losing your property. But as far as criminal activity goes the risk would be pretty low. Even if the tenant snitches on you, it's still he said she said. Get paid in cash. If the DA really filed charges on you, which I highly doubt would happen, any good lawyer could get you off.
So either don't rent it to the dude you know is growing, which is probably the best advice. Or get rent and then some for looking the other way and ignoring his illegal activities. Personally I do not condone any illegal activities. I think you should just pack it up and move somewhere it's legal
There are better countries or states where you don't have to be a criminal.
This isn't an episode of Weeds. 