My shop is a small one car garage located in a subdivision. All my large power tools are either on mobile bases or carts. This arrangement allows me to free up floor space when I need to. My neighbor is also a weekend warrior and has the same constraints I do, albeit better organized and tidier. Recently, he kindly offered me a large machine stand he no longer needed. I gladly took the generous accepted it. I can always use another tool stand.
The stand is the standard steel, angle, bolted frame structure often included with stationary power tools. My neighbor had bolted four casters on each of the removable rubber foot pads. The steel angle leg had no good surface for mounting casters without welding some sort of end plate. Obviously, it can only handle very light weights and the casters weren’t lockable.
After some thought and research, I searched the internet and miraculously discovered an old popular science hack that used two training wheels bolted onto the frame. About a year ago, I removed the training wheel off my son’s bike and kept it because it hing be useful (hoarding???). This is one of the rare cases when being a pack rat actually paiys off.
Mounting the wheels simply requires drilling holes and bolting them to the outward facing side of the stands two legs. You must ensure the wheels are flush the floor and parallel to the bottoms of all four feet. This allows you to tilt the tool stand upward and push or drag it around.
Although not as mobile as a base, it is certainly cheaper and easy to build. I built it in less than 20 minutes, Most of that time was spent looking for my tools and fasteners due to lack of shop organization. Yup, another line item on my infinitely expanding, big bang of a to do list,