How about a tent or yurt about the size of a log cabin, requiring 30 blocks of wood, 50 sticks, and 40 linen? It could be disassembled into two pieces (so it could fit into a cart), lifted, and reassembled like a raft. It would not need stone to be built on, but it would need a 5x5 cleared area, and while assembled would decay (unless on stone).
It would be as big as a log cabin, but much easier to destroy. It could be used by nomads who don't want to settle in a village, or by explorers. Maybe even give it an ownership radius just large enough to hold it?