I'd have to agree with the general point of the op, I live in a relatively affluent (depending on the circles you mix in) rural area/community and hobbies/interest vary greatly between classes/amount of wealth.
Most of the wealthy people (farmers or business owners) I know have few, or no hobbies in general, preferring to have a brand new car every 3 years, property assets and material goods. Even my 'working class' friends who have done or are doing well for themselves don't spend much on hobbies, and prefer to have 'stuff'.
Me, I'd rather live in a modest house, with a boring car, but have some relatively expensive hobbies to enjoy my evenings and weekends. Sitting in a big house or being out socialising all the time, thinking about, looking at, or telling people how much stuff I have wouldn't do it for me.
But, you need to be careful and balance it all out, don't you. A poor man who spends too much on hobbies will always be poor. Have heard stories of people re-mortgaging houses to pay for autograss cars ffs!