There is more to this calculation and other moving components which you can speak to your CPA about.

-- Look the main point is to get the loan and stop worrying about the rate as much.

30 year investment rates are closer to the 4% range, and I would imagine private money is going to be more than 4.5%.Main benefit of private money is to avoid jumping through the hoops and red tape conventional financing can bring.

We got a lot of feedback saying buyer wants 1/2 bath on main floor, not basement, even though we tried to be as open as possible.

You will mainly be concerned with sales tax, state income tax, and property tax.

Mainly for the price of entry and a some cash flow.

-I mainly market it to buyer I have relationships or post in FB groups I am in.  

Mainly finishing the basement was our most expensive part.

Typically there are three main buckets of expertise that need filled: sourcing the deal, sourcing the capital, and executing/oversight business plan.  

A business on the main level, and two 2 bed 1 bath units on the upper level.