@Grant Nash
I have no experience in flipping/rehabbing and will attempt to analyze strictly on numbers.
If you were to buy the 270K home as an investment you would have had to come up with a 25% DP = $67,500. Assuming you are coming to the table with 240K (210K+30K) this would leave you with $172,500 for your next investment.
Doing it the rehab way, you have $189,000 instead of $172,500. That's an extra $16,500 for next investment i.e buy a property with extra $66K price tag. Repeat this four times with exact same numbers and you now buy the fifth property with an extra 264K price tag!
Don't forget with each property you have extra $13,500 in equity. How so? With usual 25% DP you have $67,500 equity. Doing the rehab way you leave $81,000 (30% of 270K) in equity. That's 54K on four properties. Now multiply by whatever number of properties you have as your goal!
This is strictly by numbers. Experienced BP members can correct me If I am wrong. I am here to learn myself.