parking, the number of kitchens or one group kitchen, Single Room Occupancy codes (SRO).
Based on the issues we have run into I recommend looking at properties on oversized lots OR trying to build new on 2 lots joined. The manner in which guests are to use the facility needs to be determined in order to follow the proper codes. If you have some sites in mind and you need a feasability study, feel free to contact me. As an architect, I have the tools to help you. Good Luck!