I got casters on my welding table shown above... I love being able to move the table around depending on what I'm working on...

but.... you need to either get casters with wheel brakes or make your own some how as you don't want the table rolling around while you're working on it... I have two casters that swivel and free to roll and two others that I locked in place (welded) so they can't swivel and the brakes are on those two wheels.

Given the weight of the table, two wheels locked is more than enough to keep it from moving around....

The 1/4" plate surface is perfect for a welding table.. or anything needing tweaking with a BFH.. Make sure you have a big vice on it.. and at the back of the table recommend you have a vertical piece of 1/4" plate lined up perfectly at 90 degrees for accurately clamping stuff to for welding..