I am about to take on a rental and have a verbal agreement from the owner who says he's fine with me using it as an Air BnB. I just want to be sure when we get going on this the landlord isn't able to just tell me "oh never mind, you can't do that anymore." Does anyone have a sample addendum or provision I can add to the lease that will protect me and ensure that I will be protected to maintain my short term term rental throughout the course of the lease?