OK, I'll explain more...
What I don't get with that perspective...is you're basically saying that since you're not going to make any money off the recording...you don't really need better quality gear.
Sorry...that just makes little sense to me.
I mean...you're on here a lot asking about this or that, so I get the impression that your recording means something to you, that it's important enough for you to want to record as best as you can.
So then, what's earning money got to do with anything...?
No one's talking about the level of gear it takes to open a commercial studio...just saying that even as a pure hobby, there's a value, and it could be a very big value...exactly because it is a hobby that gives you pleasure. There's no "job" associated with it...and that to me warrants investment.
TBH, I would invest more in a pure hobby that is my passion, than then a half-assed money-making studio venture, which often makes little to no money.
I totally get when someone simply doesn't have the budget...that's a different thing.
AFA used gear...I don't know if I would get used monitors, but my studio has a lot of gear that I purchased used.
Quality used gear is not a big risk as long as you are comfortable with the source.