You can rent an appliance dolly at Home Depot or Lowe's for like 10 bucks.I need a new dolly anyway, so thought IF this would work, it would be a good solution. But I agree, it looks like it's not quite up to the task. I could probably just use the one I have and put a little more muscle into it.
The more I think about it, the more this will not work for general purposes. I use my dolly in the yard for moving landscape blocks, etc, and this would get bogged down on the lawn, I think.