Well, you see, I believe there is a concept coupled with 'fun & happiness,' which is known as 'standard of living.' For some people that means living in an apartment with a mediocre car to get from point A to point B, but for others it could mean living in a mansion with a personal limo driver for transportation. Depending on personal preference, the cost of living may be cheap or expensive.
Typically, fun & happiness have some degree of money involved, at least in today's society. Yes, I understand that money can't buy happiness, but it helps. It all goes to an individual's own taste of 'fun' and personal standard of living.
Of course, people have been known to enjoy huge amounts of fun & happiness while having very low standards of living. I don't doubt it for one second. But what is 'fun & happiness'? Can they be defined?
My two cents: fun & happiness have different definitions in each and every person's own eyes which are enjoyed after basic needs are met, AKA standard of living.