The one thing you aren't taking into account is very hard to measure and that are the intangibles..eg: pleasure, relaxation, stress relief, exercise/health, etc. And it matters not what you paid and the amount of hours you ride if you are getting those intangibles. It's been said before: you can't put a price on happiness.
Even if I spent $2300 on my bike and only ride 3 hours/week if I have a better time than the individual that spent $500 on their bike and rides 20hours/week I'm going to feel I got the better deal. How do quantify that which can only be measured subjectively? Cost vs.hours doesn't give any useful information. If you can afford it and it gives you pleasure then cost doesn't figure.