Anyway, to me a hobby isn't rewarding without some stress.
This is true and the reason I like it when something (small) goes wrong. My fish never get sick, spots, marks, curs, bruises or diseases that I can't pronounce but I do very rarely have a leak when a plumbing part cracks or a light shorts out. Then I get all excited because I hardly have any maintenance to do. I know most people spend 26 hours a day tweeking things and had to install an ATM machine next to their tank to pay for stuff but I have no idea what they are doing or what they are spending money on.
I would imagine I could take a wad of twenty dollar bills, roll it up with a rubber band and throw it in my tank, but it would just grow pods.
I haven't bought a heater since I sold my 1962 Pontiac Bonneville and am still using my diatom filters Circa 1960s so where do people spend money?
I have been going to LFSs with a pocket full of money and can't even find a coral I like so I can't even spend money when I try.
I do buy some food every few months but that isn't a big deal.