When I built my table (in my garage) I wanted mobility but it wouldn’t be often. I originally bought 4" locking casters to to mount under my 2 - 2x6 legs but even when locked the table would sway, I found these leveling machine casters on amazon and they are fantastic! They are a little more work because you have to crank them up/down to adjust (1/2" wrench works great) but when they’re down there is no movement, very solid. Another bonus there are no external mechanisms sticking out from your table legs.
