There's a lot of files running around with existing models for common projects, so you probably don't need to design your own enclosures a lot of the time unless you want to.
And printers have gotten cheap, like $99 gets you a jumping off point into the hobby.
Do people not just sell like "complete package" things?
The board in the article is $13.49 ( https://www.amazon.com/dp/B072HBW53G ). If you could get an enclosed, complete thing for $20, including the board and whatever you need for it to run, that'd be much less of a PITA than "brand new hobby" or "find someone to 3D print stuff for me locally and deal with that whole hassle".
The thing about enclosures is that they are pretty design dependent. Nobody knows what you are hooking up to your board or what the intended purpose is. Some boards do have generic type cases, e.g. raspberry pi cases.
I'm well aware. I think of the $99 printer as a filter - either it's going to catch your interest enough to justify jumping to a $600+ printer, or 3d printing isn't for you and you aren't out much.
There's a lot of files running around with existing models for common projects, so you probably don't need to design your own enclosures a lot of the time unless you want to.
And printers have gotten cheap, like $99 gets you a jumping off point into the hobby.