yes this is an expensive hobby for me. Mainly because i don't really cheap out on parts for a personal bike. i'll search for NOS c-record stuff and Dura ace for personal builds, most of it is not cheap.
But at least it can be a health hobby. The way i look at is it could be way worse. I used to collect baseball caps, i have about 100 of them. I don't really wear them that much anymore and what sucks is there's pretty much no resale value on them. At least with C&V rides you can at least break even or make some money when you do decide to sell them. It's a win win. Plus you gain a lot more bike skills by learning to fix everything.