I’m a happily married SAHM of a toddler.
We're lucky enough to have a (mortgaged) house and two cars, and we don't have to count the pennies. Having said that, we can't afford much in the way of holidays, and I'm pretty frugal (eg second hand clothes and furniture, and grow some of our own food).
We're both overweight, but otherwise our health is pretty good. I'm rather anaemic after a miscarriage but that should be temporary.
We have lots to be thankful for - my husband and I adore each other and think our little girl is wonderful. But I think we're mainly happy because our (Christian) faith gives us a sense of peace and joy even when times are hard.