The answer to this can only come from an internal reference point. I spent tons on the hobby starting in 2005 and have largely stopped. It's not like I can't afford to break an engine or drop a car and replace it; I have enough holdings to last a lifetime. Instead, over the past three years, I have been plugging away at astronomy with the purchase of several telescopes and a back yard observatory kit. I just wish I'd started even five years earlier, when my eyesight was better than it currently is. A good quality refractor telescope is about USD$2800, but the best can run to USD$25K. And that's just for the optical tube (tube, objective lens and its holding cell, and rear tube back and focuser...no finders, no eyepieces). Then, a decent quality mount and tripod, usually sold together, but not always, will run a person USD$2500 and on up. Including counterweights if the design needs them to counterbalance a heavy optical tube. That's at the prices for a C&O H-8 2-6-6-6 in brass by Division Point or something like that. Actually, they're less, but close enough.
Next, you need eyepieces to look through the scope. They focus the image coming from the objective lens cell down the tube and out to your eye. You need at least two, but most of us have several. The best run about USD$400 a pop, but some run out to USD$2000 (Zeiss, Pentax, Leica). Same prices for a BLI steamer or a brass one.
Hobbies are necessarily meant for discretionary income. Some have it, some don't. Life's like that.