I am not going to blow anyone's cover, but I know for a fact that there are plenty of well known "Pro Drummers" whose life is not as grandiose as some would assume as I did before. A lot do not have health insurance, are living in homes that were willed to them, have other forms of income etc., but they don't let it on because it ruins the image.
Shhh, this was our little secret!
Seriously, this is true, and a bit surprising in some cases. The concept of success is very subjective, somewhat relative, and may not necessarily mean financial success. With regard to the topic, there's often a wide gap between fame and financial success. Someone who's well-known may consider themselves successful for their 'fame', but may also share a small apartment with a roommate, play sporadically, and be in serious debt. Not that there's anything wrong with all of that... you just don't expect it from someone who's got a 'name', their picture on company web sites, is regarded as a full-time working pro, and you imagine them driving up to the studio in their Mercedes (or Lamborghini, take your pick.) It's more likely they're humping their own gear from the back of their wife's minivan to play a gig for $35.
Not that there's anything wrong with that...
FWIW, I have a Toyota truck and make $40.
Bermuda