About 4 or 5 years ago, I bought some harbor freight car dollies like these:
Harbor Freight Tools - Quality Tools at the Lowest Prices
I bought them for a specific project that I had to roll in & out of my garage while working on it over the winter months. I find that I use them about once a month or 2. They are very nice for moving most things heavy. I typically have a project or 2 going on in my garage at any given time. It's nice to keep that project on wheels to roll it out of the way when I have to work on something else (oil changes, tire rotation, etc). Currently, I have my snow plow on 2 of them, and had my pallet jack/forks on another.
I
cut some plywood and screwed some blocks to the plywood that give me a nice flat surface on the top of the dolly. This way, I can easily put jack stands on the dolly when I need to.