We put all our previous savings into purchasing and fixing up this house, so at the moment we don't have any cash for down payment towards a duplex. 

Then I heard about Quickbooks Online.

Save yourself the 10% of rent and Skip the PM and have your son do it.

Perhaps my wife and I could scratch together $75-$100k (with savings, 401k loans, etc.) though looking at $200-$250k for a 10% to cover down payment/points/closing.Even if I could borrow the money, would you recommend a primary residence purchase in 2018?   

Trying to analyze keeping my primary residence as rental this calculation was done as a scenario to keeping my current loan the way it is.Purchased - $110,000Down Payment - $5500Taxes - $3999Minimum Rent - $1500Currently owe $89,000 and my payment is $1000I can remove PMI by paying $7000 towards principal saving quite a bit off that as well.Let me know if you need anything else.Seems like worth keeping but curious what others think as I am new to this.View report*This link comes directly from our calculators, based on information input by the member who posted.

There are so many great free educational resources online on the details of flipping (and saving on taxes), and even more on straightforward rentals.

You will not need to sell using a real estate agent which will save you 6% of the selling amount.

Plus it will be much less $$$, and will save you from feeling buyer's remorse.

This allowed me to save money to invest in real estate when I turned 18 however I have minimal past income. 

Plenty of samples online; tailor to your transaction.