I recently moved a smallish ~800# welding table using two HF "1000# Dollies", they ended up looking like this:
The "heavier duty" blue ones from HF aren't much better, I've snapped the wheels off of two of them.
So I got some 2' square x 3/8" 6061, 1" x 1/8" 6061 angle, some BF casters and...