If each property costs $200,000 and your only acquisition cost is a 25% down payment, you will need $850,000 (17 × $200,000 × 25%) in savings, an almost impossible amount for most people.

Any reason why you need a "private person" here? 

Nevada #1 in Car Ownership CostsNevadans pay the highest car costs in the U.S. at $6,120 per year, with insurance alone at $3,439.

What happens if you buy the SFH and hate renting it by the room but the cost to maintain is too much by yourself.

Can you give more details on your numbers, purchase prices, rehab costs, time to complete rehab, ARV, monthly rent?

At this point since it's after the fact while not totally correct; you may explore adding the missed asset/basis amount as a selling cost to just reduce your gain. 

The longer you hang out on the bridge the more it costs you.

What is the cost, and what does it cover?

As long as your purchase, rehab and closing costs fall below 70% ARV then you won't have to bring any cash to close. 

This creates two loan payments ($100,000 of equity and $300,000 on the new mortgage).Key NumbersHome Equity Loan Interest Rate: 6%Mortgage Interest Rate: 7%Rental Income: $3,000 per monthExpenses (management, taxes, insurance, maintenance): $800 per monthIncome and ExpensesMonthly Rental Income: $3,000Monthly Expenses: $800Monthly Mortgage Payment: $2,000ExplanationThe investor earns $3,000 in rent each month.They pay $2,000 on the investment property mortgage and $800 on other expenses.This leaves $200 profit each month or $2,400 per year.However, you have to pay $6,000 interest on the equity borrowed.This leaves you with an annual loss of $3,600.While the rental property generates positive monthly income, the interest cost of borrowing the initial $100,000 results in an overall loss.