Well, if you're going to find the most expensive example to justify spending days for a partial solution, then sure, it's neat. The reality is that he could have gotten a powerfeed for not much more that he'd have spent on the motor and materials (unless he's using scrap). Making the tool to make the tool is one thing. But, using an overpriced example as the justification doesn't work.
Man, I sound cynical. I think I've watched too many videos of guys spending hours to build a bad knock-off of a Harbor Freight tool that could be bought for less than they paid in materials.