Have a question concerning a deal structure and vale of a fourplex I am looking at.

So many of the variables in your analysis would be people and their opinions on value and where the market is going.As you mention, after tax cost is a concern as your rentals may be generating taxable income however your rent is not tax deductible. 

I had a feeling it was the 'right' decision to do so, but hearing it from multiple investors has helped clarify my confusion and concerns.

My concerns would potentially be reduced future purchasing power as a result of less cash flow along with the increased debt to my name.

@Matthew Paul,I understand the concern--I've heard similar from trusted confidants that I've shared my plans with.

The dirt basement and there being a dwelling down there is concerning, for sure.

Any borrower caught in the middle of this ebb and flow with the potential of closing a loan that is 40-basis points higher than when they signed the application is concerned.

I would, however, advise your aunt to refi, unless she's more concerned with paying down the balance on the mortgage for the next 8-22 years.  

Part (a) seems to overly restrict you from going after the agent if they make a mistake that causes you a loss. 

I am using a high level professional with a good reputation but I am concerned they are just too busy and the underlings don't get it done right.For those that have complicated returns what is the accepted amount of material errors to see in a tax return?