David Greene's method in podcast 327

[Ryan Keenan]

Hey BP, I listened to podcast 327 a few times and trying to figure out what David Greene was talking about when he said he got a commercial line of credit for 500k and then bought a few houses, rehabbed them until the line was used up. Once the line was used up he refinanced them into one commercial loan and then restarted the process once the line was paid back? Do I understand it correctly? How do you get a 500k line of credit? Once you have one or two houses on the line you probably are not cash flowing yet because you are paying higher rates? Thanks for the help! Ryan