We are thinking of getting an Aliner and will pull it either with 4 cyl. Saturn. Hubby says Prius won't pull it.
You may be better off asking that on the Aliner/Chalet board
http://autos.groups.yahoo.com/group/alinerchaleta-frames/
It all depends on what Aliner you get, our LXE weighs 1850 and loaded it's closer to 2400. I'd think a 4 cyl would really struggle unless you get one of the stripped down tiny As