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That I don’t know. I haven’t been looking into one-board computers for a while. The one I bought ~10 years ago was running out of juice when I was trying to run Kodi on it last year. Wifi shouldn’t be a problem IMO, I’ve been using mine as torrent downloader and hosted a few university projects (dynamic web apps) on it. The graphics might. I would guess that as long as you find one with decent specs (so probably not the 10$ one) it should work. I’m sure there’s someone who is doing exactly that and either could answer what to buy/look for or wrote a blog about it
Personally I don’t but my grandpa was electronics engineer by trade and hobby and I was also talking to some electronics engineers in my previous job when I was toying with the idea myself. In both cases for home projects they were etching the paths by covering the plate with laser printer ink. When you get really good at that you can even get into SMD range of path width. The higher part of the range - you can’t outdo machine ECB printing if you want to get the paths really narrow - but workable.
Although, some of my colleagues at work were saying that at the prices you can order an ECB to be printed nowadays (for hobby better to find something local, so you have easier contact and shipping won’t cost you a leg) it’s not worth the hassle anymore. Pick the business which page looks like from the 90s. You are looking for electrical engineering veterans so they know more about electronics than webpages
You might want to search for your local hackerspace. For sure they have it all figured out for the area they operate in