Personally, I'd only rent if the landlord was aware of my activities. That probably means providing the landlord with his legitimate rent, and an additional under the table (off the books) cash supplement. Don't even consider renting and trying to keep the landlord in the dark. The landlord has a legal right in every state I know of, to access or inspect the property with a stipulated amount of notice (24hrs, 48hrs, ect. depending on the state). Last thing you want is to be scrambling to get everything out in 24 hrs. I know someone who had to do it, and it wasn't fun. Luckily, I'm in Oregon and can grow legally for myself.