A doctor has an education and duties that requires the use of brain cells, so does an engineer, an architect, the president of the bank that funds projects, a GC is not even in the same ball park as professionals turning out 8 or 10 houses a year.

Solutions, being a resolution-engineer is hard. 

I am a software engineer and real estate investor.

Cashflow gives you stability and sleeping power; appreciation is your wealth engine.

Reverse-engineering that then, are there any properties making more than $150k/yr?

I had a question for you about the Airbnb views on the algorithm.

CPAs do not do that, you need a cost Seg engineering company that does this..

This is because lumber, rough mechanicals, site work costs don't vary much whether its entry level or higher end housing besides likely using engineered instead of dimensional lumber assuming larger homes with wider spans.More to your point about building multi-family, in Philadelphia I am finding it more and more challenging to build multi-family housing.

I challenge you to look at it all in reverse order, yes, reverse engineer it. 

I've used DIYCostSeg in addition to an engineering firm.