I wouldn’t buy a printer to try and be profitable per say, I would buy one for the things you cant/don’t want to buy. If you can use some 3d modeling software, you can begin to solve problems for almost no money.

Stuff like a vape holder and extended cup holder for my partners car, or a couple little shelf brackets for our IKEA cubes, or replacement closet rod supports. It takes a few minutes in CAD, a couple hours or printing, and 15¢ of plastic, and saves a trip to the store. Making custom, exactly how you want stuff is really nice.

Knick nacks are fun too, but ultimately your house will fill with things you don’t particularly want or use.

I’ve seen brass colored on some older plugs.

While I also like the idea of a separate second “internet” I feel like this is just another ID check requirement. It would still be better than a porn token wallet I guess. Either there would be an identity tied to all traffic from an access point(still a privacy problem) , or the access points themselves would have to be like, kept away from children or something somehow. Parental locks?

“0h h1” is a fun, easy logic puzzle game that I find myself going back to when I have a minute to kill.

Yep, a microwave emits orders of magnitude more signal strength than any control system will. My microwave at home, even closed, leaks enough to introduce noise in my wireless headphones if I stand close.