Edit: so it turns out that every hobby can be expensive if you do it long enough.
Also I love how you talk about your hobby as some addicts.
Photography.
I started to really get into it back in 2015 with a Sony A6000 and a kit lens. Then you buy more, higher quality lenses. Then you buy better camera bodies with full frame sensor, then lenses that are full frame compatible. Then the various odds and end accessories. Then trips around the world to take pictures of things.
I have taken a break from photography recently, on account that having a kid doesn’t allow me a lot of opportunity to edit my photos anymore. They say the best camera you have is the one that is on you. That has proven to be true while I try to be as present as possible around my daughter. I can quickly take out my phone, capture the moment and it will take care of most of the post processing edits that I can share with family later.
I picked up photography back in May which just started by getting an old point and shoot digicam to take convincing liminal space photos, then I got another… then another… then some film old cameras, a cheap DSLR a set of lens, etc. Etc. It’s become a full on addiction at this point lol