Buy quality not quantity.

For example, if a 1,600 sq ft main house is appraised at $100 sq/ft, what could I expect a 600 sq ft ADU of similar build quality to be appraised for?  

You will constantly hear of  shortcuts during construction and the conscientious decision to use lower quality materials during the renovation. 

He is a good mentor I have had 1on1s with the guy and he has been outstanding.

Your returns in investing ultimately come from exchanging terminally abundant goods (fiat dollars, debt/future fiat dollars) for terminally scarce goods (high quality, supply constrained real estate).Selling to go into cash isn’t of interest unless I have a short term need for that cash or am funding another purchase.

I specialize in single family homes in middle class neighborhoods , working people providing a high quality product for tenants that stay for avg. 5-10 years.   

No formula can be accurate across the board because even “cookie cutter” properties next store to each other differ as to view, location to the street, topography of the land, lot size, physical condition of the property, past remodeling, quality of the mechanical systems, sunlight, utility bills, past use, etc.  

Quality VAs can do anything.

And I put all quality materials and high end finishes throughout.

You have contacted me on several occasions to collect an outstanding debt you claim is owed.