Indoor grow room set up questions

So I rent a house with a buddy and the house is my buddy's dad. We want to use one of the rooms in the house to cultivate under state and county law. The landlord is all for it but is concerned with the risk he's taking, being the primary owner of the home. We are all licensed and would not exceed the limits of capability (by law). What kind of concerns or legal confrontation is HE!!! And I stress HE! Looking at if any at all?

Not to be a dick, but don't take 'guesses here for something like that.
There's this new invention called "Google".

None if he isnt helping u he just renting the house to u and what u do is on u!!!!!!!