01-07-2022, 10:57 AM (This post was last modified: 01-07-2022, 10:58 AM by Tony Griffiths.)
Whatever you build, just put it on four top-quality castors. One workshop I saw was so full of machinery that there was only space for the owner to stand in front of one at a time. Each machine was bolted to a heavy, fabricated trolley on castors allowing it to be manoeuvred into position as required.
I made some for my own business and have one spare 40" x 18" able to take half a ton. If you'd like it, it's free for collection.