It's a good show, and yeah, it definitely illustrates the financial stresses of major medical issues.
One thing it got me thinking about is that a lifestyle like that is very much an all or nothing venture. To be successful at what Walt does, you can't really hold on to conscience. The show has him slowly slipping down a slope, but I think to do that in the real world, you'd pretty much have to do a swan dive off the cliff of conscience. You couldn't take time to go see your wife have a baby, you couldn't waste days in the hospital cause your friend got hurt, not when you have a deadline. The business would always come first, before anything else. And you couldn't be compassionate and entertain friends that make foolish decisions. The show allows a lot more latitude than I believe the real world would allow.
Reminds me of the old bible verse that says you can't serve two masters. In the show, Walt keeps trying to please both and it doesn't work.