The amount of people in the US without medical insurance is pretty high, this could have a tremendous impact.I know we can't know for sure the answer to the questions above but curious what you guys have to say. 

It also reduces your risk and increases your returns."

I want to explore ideas on how to reduce my tax burden. 

I would say though that keeping your fixed monthly outflow (22% to 401k, loan payments, living expenses, etc) lower and having a large emergency fund greatly reduces your risk.

I decided to play with the numbers on TT to see if I could reduce my tax liability. 

(not making them pay the real rent advertised for example)This is an odd one but I am in the process of buying my first multifamily property and I thought I would ask you fine people :)Generally speaking, is it a good idea to try to keep the current tenants to reduce vacancy? 

I believe she has tried to identify tenants that could be house managers and reduce the rent for them. 

You want to find a way to reduce the possibility of turnover because that can cost you money that will typically take a while to recoup.

Try to get the city to reduce the taxes.

Next is to determine if you can increase the NOI through enhancement in the property, reducing expenses and raising rents which will ultimately increase the value of the property.