Seems simple enough. I just need to find a cheese plate “lying around”! You can buy one for $140 (if they ever get them back in stock), but this seems cheap and easy to build.
To save you some time, here’s what he bought to make it:
Then just use any old tripod head, grab 2 carriage bolts with some washers and wingnuts to hold the skateboard wheels on. You can buy them elsewhere, or even cheaper by going to Target and building your own cheese plate. But even with this basic setup you can build one for around $50. Not bad!