Here is what it found:Full Bathroom: 23% increasePartial Bathroom: 15% increaseGarage: 13% increaseCentral Air Conditioning: 12% increaseFireplace: 12% increaseBasement: 9% increaseClose to Golf Course: 8% increaseHigher Ceilings (9 Feet): 6% increaseAdditional Bedroom: 4% increaseLaundry: 2% increaseAbove-Ground Swimming Pool: 0% increaseIn-Law Suite: 5% decreaseProfessional Office: 5% decrease

First, is the unit in market condition? 

This is an opportunity to meet the Tenants personally, document the condition of the home so you have a starting point (I use pictures), and see if they have any complaints, questions, or maintenance issues.2.

I can call them any time a new property comes on the market and get detailed information about the condition and how the current owners operate. 

I'm an investor, real esate agent, and house flipper, I've never found it so difficult to price a home in its current condition or a projected ARV. 

So you have to hope that you can do that fast with minimal downtime.Without knowing the insurance, taxes, condition of the house and it’s mechanicals it’s tough to say how great of a deal this is.

Both the parking and garages or rare in the area It was given to us from my wife’s ex in laws (long story there ) but has a mortgage of about 145K and a mass health lien is 25K.

On a positive note, those fees are only a few thousand dollars or less so even if they are forcing a buyer to pay this fee, it should not be a deal breaker depending on the duplex condition and price. 

Very tough to find with current market conditions in nearly any location right now. 

So, the calculator doesn't help determine condition of property.