the most common way is to use square footage. 

We pay $99 per year for the Ring security system and they cloud store camera footage along with alarm history. 

Rental rates are relatively strong with rates in the $1200 to $1400 depending on sq. footage and condition for homes that sell in the $140k to $160k range so you are not quite getting the 1%.Hope that helps!

sq footage?

square footage and location of the huge shop matter also climate control, power, and water.

We didn’t know all of those people were actually in the house until we went through the footage.

@Trenton Brown Location is very important if you want to consistently have your MTRs filled all year round, I have a few MTS in San Diego that are pretty much have 100% occupancy that last 2 years I've had them. 

The square footage of the home and the amount of rehab that was needed appeared to be feasible as my first flip project.

Then one about 5 minutes from our house different style but similar square footage went under contract In 7 days at $339 .

Below I've included a link to the Philadelphia Zoning Quick Reference Guide:http://www.phila.gov/CityPlanning/projectreviews/P...In the CMX section you'll see the minimum square footage requirements that are needed to make a unit legal.