My other hobby is acoustic guitar. The 2 hobbies are remarkably similar in cost. I've got about $1400 in my Larrivee guitar and I'm about to buy a bike in the $2,000 range.
The guitar will last forever and the only cost from here on out are new strings. Strings last 3 or 4 months before I need to change them out and they cost about $15. 50 bucks per year.
The new bike will last many years and there will be a few dollars spent on tires and possibly a couple upgrades but they are one time upgrades that will last a very long time. A set of tires will be like 100 bucks, maybe once per year.
Both hobbies are basically a one time expense.