After I ETS'd from the US Army my wife and I and my two kids lived in a tent for 6 months while we gathered enough money to do what we planned on.
Now I have five grandkids. We were just as happy living in that tent as we are living in this now big, empty house.
Our two kids dude.
Isn't that sentiment rather age dependent? Happiness however is precious, and to be savoured. Alas it is also punctuated by pain and suffering, typically.