All hobbies can get expensive, that is the nature and the danger of a hobby.
I find that I feel more comfortable in this skin when immersed in a specific interest such as motorcycles.
Every aspect of a rebuild requires and time attention. Both of which could be wasted on mindless horse$hit like" end of days "television shows or discussion over some high level political crap that non of us has control of..
But with bikes , you have to be focused in building and riding. every decision counts, it is all so consuming. Checking what you did yesterday, what you are doing today , what tomorrow's plan is , how ill it all turn out, and that's just the building part.
When riding you think about what you have done to the bike so far , what you can do to the bike next, weather conditions, road conditions, how are these cars might try to kill me, and avoidance techniques. The experience encompasses the mind, not a moment wasted on useless bullsh!t. Always a rush of excitement at every turn, even when you shut it down, drop the kickstand and flip you leg back over the the seat of the machine, you know something special has just happened.
I don't know if anyone could consider this a hobby really, 98 % of us are obsessed and graduated well beyond hobby many years ago, most of those are known as collectors by what we have, never mind the ones we are scouring the earth for and hadn't gotten yet . It's an amazing thing to find that so many are drawn so deeply into this activity that the word "hobby" just doesn't seem right, and yes, it can get expensive.