I got for free an old wheeled frame that is used to haul trash cans. It's a rectangle made out of metal pipe with two small wheels at one end, like lawnmower wheels. I put a board across it and set big pots of annuals on it. They sat there all summer. I could easily move them around. I'm going to try to find other wheeled transport for the same use.

That's a great find and quite an ingenious customization of it. I'm currently eyeing up some old wood boards I have. Currently thinking of building a large cold frame out of them. I have most of the pieces so there's little cost to me. Got the itch from a Victory Garden book I bought at a thrift store.