All of it was due to investing. Me and wifey lived off one salary and saved/invested the other. Do this and generate returns of around 15% per year, and you'll have plenty.
Well, that's not something I see often. Real card counters are a rare breed, indeed.
After I retired, I put together a bankroll of $60k and studied and practiced obsessively for 6 months. Then I started hitting the casinos- monthly trips to Vegas, and several shorts trips elsewhere.
And I'm sure you know that counting cards is NOTHING like they portray in the movies. The edges are razor thin and the variance is just brutal. And good games with pit critters that will allow decent spreads are rare too. I did it for about two years, then was burnt out and quit. Made some money, but not a lot.