I made the rooms in my hotel, placed beds for the players as well as boxes, but when someone rents it, they disappear. Are the rooms supposed to be empty for the players to fill themselves? When the player tried to place his own bed, it wouldn't let him because it's building blocked. How do I solve this?

Ok, I figured this out on my own. You have to place everything you want in the rooms before you save it, otherwise anything placed afterwards disappears when someone rents the room. 

Correct everything must be set exactly the way you like it when you do the /hotel rooms command. This Takes a snap shot so every renter gets this same fresh room when they rent.. You can choose to allow players to alter their rooms if you like and then they will reset when a new renter comes.. the same renter can re-rent the room without any room changes.

Merged post

I also prevent building, and Prevent allowing players to place TCs, but allow deployables in the zone.. This allows players to edit their room and not be blocked.. Just be sure to turn on no decay in the zone