What is your "inexpensive" hobby that turned out to be expensive/ you gradually invested lots of money into?

https://sopuli.xyz/post/2837546

What is your "inexpensive" hobby that turned out to be expensive/ you gradually invested lots of money into? - Sopuli

Flight simming. Started out with a cheap joystick. Now I have an expensive one, throttle quadrants, rudder pedals, a vr headset and I’ve built myself a button box and a flight seat. And I’m now I want a helicopter collective. Oh well…
lol at some point is is cheaper to take flying lessons?