Then do not leave your belongings unattended. Especially if you are going to be gone for a week, as in your example.
Personally I like the having to claim a house (even if the timer is a bit to short, and I wish there was a reminder when you log in for it at least), that way if a player leaves the game or server it doesn't sit there for a month or more taking up space.
I'm confused at the second half of your response.
If I build a house and leave the server the house I built would still sit there still be of
no use to you. Even if you claimed my home and the "home slots" are filled they don't become unfilled because im inactive and you will still won't be able to "set as home".
Which means you still have to build your own home or dwelling if you wish to recall.
Which also means regardless of the claim timer you still have a useless building on the server.
Thus my confusion...