I have been researching this on the side, and I discovered that "Cost per rentable square foot" is more commonly used In the self-storage evaluation business.

We’re about to move into a 3 bed 2 bath house in White Salmon WA. 

How to add the SQF of the new construction ADU in the property title?Thank you,

Thus, remote control gets easier.1Total vacant rooms822Total occupied rooms1473Customers1474Total rooms at facility22956Total unique customers13478Total customers w/ email addresses on file1139Percentage of total customers w/ email addresses on file 84.33%1011Total facility rentable square feet36,700 SqFt12Total occupied square feet23,100 SqFt13Percentage of rooms occupied 64.19%14Percentage of square feet occupied 62.94%1516Number of rooms on auto payment11917Percentage of rooms on auto payment 80.95%18Credit Cards10519eChecks142021Cash2.44 %22Check10.12 %23Credit/Debit Card87.45 %24Corporate0.00%25Money Order0.00%2627Number of rooms covered by SafeStor4028Percentage of rooms covered by SafeStor 27.21%29Number of rooms with 100% burglary coverage403031Potential rent per square foot$0.6632Potential monthly rent$24,165.0133Monthly income at current occupancy rate$14,625.0134Monthly income lost from unrented rooms$9,540.00

Find Brandon's videos on YouTube for the "four square" method of analyzing homes and practice.

One begins checking a website for brs, baths, garage, square footage, yr built and lot size.

I spoke to a few appraisers in my area and some just count the JADU/ADU as square footage to the main house (if its attached).

Looks like a nice install, square d is good equipment, also looks like they have a 120v circuit (now required) for the AC techs to use. 

Heritage owns 1.1 million square feet of industrial in Indiana already so this 200k adds to their footprint, They have 10 million sq ft in office/multi-family and industrial in 20 states with >2 billion AUM. i clipped some of the financials and debt info belowand since you are the DSCR Master, andCarlos, I know that initial and rising DSCR is making you a little moist :)

I am a broker in Washington state.