Spending the money you are talking for a system that will add minimal value is not where you should be spending your money for a flip. 

Our plan has been to establish a strong financial foundation of properties that provide very strong cash flow while capturing the high market appreciation (maximize returns while minimizing our risk).

If the house were minimally livable based on other prices of houses in the neighborhood, excluding the extra land what do you think the house is worth if you had to sell it?

If the SMP 500 gives an average return of 7% return each year, and has minimal risk, then we do not want to invest in anything that has more risk for the same yield.

He would like to sell the property while minimizing his tax liability, which ideally would be an additional land contract to our company. 

Typically on an investment property purchase transaction lenders will require a minimal of a 15% down payment. 

.- Consider liability protection: Look into forming an LLC or other business entity.Starting with cash is a smart move to minimize risk and learn the process.

Good to excellent credit scores are preferred for optimal vacation rental mortgage rates and minimizing down payments. 

Their job is to make sure the bank is covered and takes a minimal risk.

I think BRRRR is a really powerful strategy to grow your wealth fast even tho the cashflow is minimal in the beginning ( giving that you will be 100% leverage if is done correctly).