maintenence isn't so cheap, the average person does 12K miles per year in a car, maint assuming everything else is good to start with is 4 oil changes = $80, 3 if you stretch it = $60

Bicycle
1000 miles = chain $__
2000 miles = chain & tires $__ + $__
3000 miles = chain & cassette $__ + $___
4000 miles = chain & tires $___ + $___
etc.. to 12K

When I went to the bike shop I paid $90 alone for two good road tires. The chain replacement sched is based on page 147 of bicycling mag guide to maint latest edition.

When I bought a motorcycle I thought this thing will be cheap to ride, I'll get 50mpg. I didn't know that a helmet would cost $300 a jacket $150, tires that last 3-5K $100 each or more, windshield, bags, accesories etc, services 2-500 etc... Cost me a bundle.