I have been moving some pretty heavy stuff around my shop lately and most times there is no one around to help. A while back a friend brought over some small dollies he got on sale at Harbor Freight for $9.99. I lift up a sheet of plywood and set it upright on the dolly and off I go with it. Depending on what I want to move, I can use two or more, the weight keeps them in line. I even kept my Steel City drill press on two of them until I cleared the space I wanted it to be.
Here they are, they go on sale often. I have four and will get four more. Sure, I could build them myself, but where would I get four heavy duty casters for ten bucks?
It was a great idea to me, just thought I'd share it.