The only time you STOP making money in real estate is when you sell the property. You make money whenyou buy, You make money when you hold. You make money when you lease. As soon as you sell, you are done making money off that property.
Clearly the example used here for $150 cash flow or $40k cash is garbage. If you were talking about the same exact house it would be $150 cash flow and $40k equity at the same time. There is no either in buy and hold. It is both. That is the point. You get both the equity when you buy and the stream of income (and pay down and appreciation and tax benefits) when you hold. You can have your $40k anytime you want. You just have to give up the rest to get it. Depending on your financing, you could have all three. Just ask @David Krulac
He and I have similar models. But a house with 40k equity that cash flows $400 a month and then find a bank (or private lender) and refinance the 40K out (or 30k or whatever). Then you get all thee. You keep the cash flow (reduced but still there) and you keep the equity (reduced but some still there) and you get the immediate cash. On top of that, you don't pay any taxes on the cash you pull out because loans are not income. On top of that, the amount of equity the bank makes you leave in the house would be lost to taxes if you sold anyway. So the argument that the bank won't let you have all of it is crazy. They are the only way you get to keep it all sheltered from taxes.
All I ask is that you stop selling your houses unless you have a great reason to do it (you absolutely can't get the cash out any other way). You sell = you kill the golden goose. Some gooses have got to go, but you better dang well be sure the goose is done laying golden eggs.
If you just bought wrong, you won't have cash flow or a $40k assignment fee coming your way. At least compare apples to apples.