Here is the way I look at my bike expense:
1) Since I have been riding my overall health is much improved meaning less for medical care.
2) I eat much better and actually much cheaper. Compare the price of a bowl of oatmeal every morning to a sausage biscuit, hash browns and a diet coke from the local McDonalds every morning. I take my lunch to work most days. No soft drinks, no booz, no cigerettes, no chewing. (I'll stop there).
3) Since I will live longer (under normal circumstances) then my meaningful lifetime income will be more.
4) I receive the absolute lowest rates on health, auto and life insurance because of my physical condition. i.e. perfect BP, extremely low cholesteral, low resting heart rate below 50 bpm, no diebetes, etc, etc, etc..
5) Keeps me out of trouble. Trouble is always a big ticket item.
6) More time on the bike means less time in the car. Guy just has to be traveling somehow.
7) My sefl esteem is much improved and I don't go looking for ways to manage any depression.
8) I fight stress much better, meaning I am more productive at work and around the house. This is $'s saved and earned.
and if your wife does not buy off on all this tell her that sex life improves. Now the pressure is on you !
Don't feel guilty. Be proud you can sport such a nice ride. Enjoy.