They rely on the historical data to formulate their opinion of value.

I believe the 'fair rental days' data is needed for something completely different (i.e., the ratio of days rented vs. personal use).https://www.irs.gov/publications/p527#en_US_2018_publink1000219036The IRS link above clearly defines when a property is ready and available, which is measured differently than fair rental days. 

1  Setup Self Directed IRA Account and fund it.2  Buy property $100,000 with funds from the SDIRA.3  Collect rents, pay expenses, manage property through SDIRA.Questions:  Can the IRA take out a (non-recourse) loan against the property?

At this stage of my search, I feel like I'd basically giving a forward pass to another agent to collect a commission in the next few months since I've already done a ton of research and I know I'm going to buy something by summertime.

There's several things that are trying to create data like you're looking for, but the above way is definitely the most reliable.

@Joe CasizHere’s some sources for market researchZillow and Redfin for historical sales dataDriving the neighborhoods and attending open houses The US census for income and employment data etcMunicipal website for list of employers

Feel free to reach out for specific area market data / trends or a price opinion.

Your issue is collecting unpaid rent for April and damages to your lawn.The first step is to properly notice them with a 3 day notice to pay or quit.

A BRRRR deal usually reduces cash flow a bit so a plus to waiting is that you collect more in cash flow in the meantime. 

Route operators have their service techs do the collections so they are able to do repairsat the same time.