Thanks for the response!
I have another two questions:
1. When a villager in your town is in boxes, can you ask someone else to move in on the same day from another town?
2. Can villagers use the hot spring? http://68.media.tumblr.com/6b18193c08d0401d4a0890eabbce476f/tumblr_npstmeWfLt1u2b9ato1_1280.jpg
I've never built the hot spring before so I'm not sure if it's interactive.
1 - no, you'll have to wait until their house is gone.
2 - no, that's either a hack or a photoshop job. Villagers don't interact with any PWPs at all except for the benches and other stuff you can sit on (ex: the boot sculpture)