If you can’t afford to buy a house, you can’t afford to buy a house. And his target market isn’t folks that have good financial discipline.
Ideal would be to buy a house with a 30 year mortgage, and then make an extra payment PP&I payment every month. But his customers aren’t likely to actually do that.
Same thing with his credit card advice - he says pay off smallest to largest. Ideal would be pay off highest to lowest interest rate, but he knows that his customers need to be able to see progress to stay with the program.
It’s also the most financially unstable that tends to benefit most from the snowball approach.