Most people don’t even own a soldering iron to wire it all. That’s another $20 right there. Just, it’s fine to say DIY is about the fun. And by all means, anyone who wants to have fun tinkering with some tech, go ahead, it’s a blast. But it’s never about the money. It’s disingenuous to tell people, “Oh I did this $300 at retail machine for $10”. No, you didn’t, you are just doing creative accounting and failing to report previous expenses. Because if it could be done for $10, big manufacturers would be doing it for $7, because they have the advantage of economics of scale.