As much as I Love seeing Donkbaca go ape over someone Elses cabinet choices...
Realistically, such cabinets and desks are made as cheap as possible, using low quality thin particle board, poorly enforced joints, and they barely hold up to normal use. (which is why you see them on the curbs all the time)
Rocking the thing with any force, such as when playing a physical game of Robotron, would tear that stuff to shreds in seconds.
A full cabinet gotten for cheap is a much more viable solution. You get a coin door, some controls, some wires, possibly a monitor, power cords, speakers, bezels, and existing art... if you dont want to simply paint it black.
All you might have to do it make a single control panel top change... and that can be done with minimal tools and time.
A bartop may seem easier.. but in reality, its only merely the size that throws you off. Its all the same work, just a little less of it. AND, you have to devote a table to use it. (unless you make a base for it... which then pretty much makes it a full cab)
A bartop for example, still usually has T-molding. Which means you need a router, and an expensive slot cutter. As well as t-molding itself. And then theres all the rest of the stuff...
If you are going to re-claim something for a pedestal style, it had better be some sort of older 'furniture grade' thing. Not a walmart / ikea special. Something with real thick and strong wood. It will probably look like hell, but re-claiming is cheap. It still doesnt solve woodworking challenges. But it would give a good introduction and experience. Any mistakes or wood-working butchery made on free material is an easily acceptable loss.
Ive often wondered how well cardboard could be used to make a decently looking project. With use of ?soaking? some parts in a glue-water mix, several layers, I-beam style struts, and maybe paper bags for a smooth cheap covering... It might actually be passably nice. (especially for the tool & money challenged)
Edit:
As for moving, cabs are not that hard with 2 people and a dolly. You could make a split-cab... which separates into 2 or 3 parts. The monitor is usually the thing that weighs the most. Unless you use or replace it with an LCD.
A bartop is of course much easier to transport.
A standup without any weight to it, would rock-n-roll way too much. (unless maybe you put some sandbags in the bottom of it)