How much can I give a player to rent? Does everything in the room become theirs for the duration of their rent? For example, I give them a bed as a spawn point. If I give them boxes, will stored items stay there for the day? What happens to said loot if rent is unpaid? 

all the deployables in the room (boxes, beds, etc) visible by the door at the time the /hotel rooms command is run are stored as the "Default Rooms List". When a new renter rents the room, the items are cleared and only the "Default Rooms List" items, are spawned back in (and assigned to the Renter). The Players can use said items until there room expires. Once the room expires they must extend their room or the items are lost when the next renter rents that room. Currently Items in deployables are not stored on reset only the deployables. This means you could give new renters beds and boxes but not boxes with loot in them.. Players are allowed 1 room PER hotel in the current design.. Each hotel rent and duration is customizable