So you can set the rent time and the rent cost.

Let's say you make it $5 for 2 days. The player has claimed a bed there, has items in boxes there.

What happens after 2 days? Does it automatically charge the player $5? Does it lock the player out? Are the boxes reset and the items are lost?

It appears that after the 2 days, the room is up for grabs. The player must activate the door in order to reclaim it.