Look up market rental data to know if you're in a lower paying area.

If you go in that direction, I highly recommend speaking with multiple franchisees from each brand before making a final decision.

Firstly, well done for persevering and trying every avenue you thought would get you the data you needed.Most would have caved earlier and handed out there hard earned cash for old, saturated leads/records from the same prominent platforms which dump them pretty much when they receive them from either 1).the same large brokers AFTER the county has listed them on the county website or, 2). from the counties themselves directly AFTER the county has listed them on there own website, or, 3). from data scrapers on Upwork/Fiverr who scrape the data from those same platforms AFTER the counties/brokers sell those platforms the data being scraped by the freelancers.Anyway, rant aside you seem to of made the same mistake i made when I first started branching out away from providing leads to my original couple of clients i got from Upwork who wanted me to scrape data from court records in FL for pre FC leads.Simply, I didn't know where to look for the information I needed in states outside of FL.FL only allows the judicial route to foreclosure so I only needed to know/find/scrape the data from Lis Pendens documents for counties they requested.

I'd have them sign my own lease on renewal and I'd make sure I had enough information on them so I can go after them if a legal issue arises such as employer and other similar data. 

Finally, always get the credentials to access the mortgage account online and change the email notifications to your address.

Here's a link to the data:  https://mred.stats.10kresearch.com/infoserv/s-v1/vwxD-yIT2.

I’m happy to share more data if interested.

Louis Fed shows the delinquency rate on residential single-family mortgages, and proves there's a way to spin this data to show that delinquencies are increasing rapidly.

Finally, I would add allowing pets to your home. 

With all this said, to answer your question of how you'd value this for a sale, I'd get a STR specific broker that's able to market your property as a turnkey STR with data on the rents, figures, etc.