While certainly as you mentioned there is room to improve it, I'd argue that the strength of the calculator is in the presentation the data is given to you in and the predictions they can provide. 

I'm buying a 16 unit apartment complex and looking to slowly renovate the flooring in each units.

Constructing a new property is a complex process but there are many instances where renovations can be more expensive.

Sale Price 845K Last May ( I managed to snag the house for list price when everyone else in my condo complex payed almost a million)current estimated value: 950K (conservative) Mortgage: 3900Rental price: 2000/room (furnished) = 6000.  

@Ryan Jones your analysis looks fine, my question, however, did you confirm through the HOA bylaws and covenants that rentals are permitted in the complex?

This is in the same complex as our other two STR, so we will be able to expand and host larger families traveling to the area.Secured owner financing on 80% LTV.

Not sure I trust the complexity of the on demand system to last substantially longer than the tanked version.

Hi — looking for recommendations for tax or property farming software My MLS went from realist to CRSdata and it’s awful I’ve seen propertyradar and prospectNow so far

You are better off doing your comparisons based on the data that they have on their own websites.As far as set-up, I think there are some platforms that can help with that......wait for input...:-)

My Fiance and I purchased our first duplex in Everett this year and need some help filing our taxes with this added complexity.