The more cash you put down the more it will cash flow.

Her idea at present is going to be to purchase the house herself (using traditional financing - high interest rate) and make the payment affordable for the family's rent to cover by arranging the sale well below market value and putting up a down payment of 30+ % of her own money, resulting in a PITI of ~1500.

In the last 30 years, I have put on about 20 lbs... most of it came on this last decade.

You will then have a few options with that rent money....you can put it into principal or you can start saving it to purchase yet another property.

Hey Brian,Majority of the properties I BRRRR start out without HVAC and I put HVAC for all units.

If you can reinvest the income at a higher return % than your mortgage rate why would you put it toward accelerating your amortization? 

To rephrase my question, if I put a house I intend to wholesale under contract for $100k, and find an end buyer who agrees to pay $130k, what prevents said buyer from doing a little digging and contacting seller and waiting out whatever option period me and seller agreed upon and saving $30k? 

We worked to put together a development deal for a local developer.

Are you zoned to be able to put a campground in?

In fact, I just got done with one in FL 2 weeks ago and put it live on Airbnb over the weekend.