Your initial monthly payments will be very low and then build up as the project gets to the end.

This is one of the best ways to scale a portfolio while keeping low out-of-pocket costs.Big Picture: The Best Move for You•If you need funds now, a HELOC in your name makes sense—but keep the rental in your personal name to avoid triggering the due-on-sale clause.

Lets say your accountant tries to write off as much as is legally possible when it comes to lowing your taxible income so that your tax burden is less and you pay less taxes.

Low down payments but I can still use them as leverage.

Also, after a year, the mortgage hasn't been paid down by much, especially if it's a 30 year mortgage.The only challenge you may run into is if you purchased it using a low or no money down mortgage option like FHA or VA lending.

Is it doable - yes but you will need to go to a lender who probably uses their own funds vs. an instituational lender as they will not like 2nd position nor the low amount.

Don't let the idea of a low interest rate trap you from upgrading to size/scale.

The current rents are really low because the tenants are responsible for doing any and all repairs on their buildings (which in my opinion contributes to the poor condition of the buildings). 

if it's low and you sell, that rate is gone forever. 

.: @Patrick RobertsThat's a lot of words to say you're advocating tax fraud since there may be a low likelihood of getting caught...