Ask for a comparison based on the current coverage and also any recommendations for better coverage. 

Without having MLS access it's more difficult, but can be done :) I would not go in with numbers based solely on hopeful STR analytics.

Analyzing 1 year of data from: 2014-12-20 - 2015-12-20Total Properties Sold: 4887Properties Sold to Plaintiff (back to bank): 3155Properties Sold Third Party (real people): 1147Properties Sold Unknown type: 585Percentage of properties sold to third party: 23.5%Based on the analysis of the properties that were sold to third parties it is also possible to see how much the properties were sold for compared to their market value or some other trait.

RE markets are efficient and based on numerous criteria. 

Smaller industrial properties have maintainedimpressive occupancy rates and rising rents for several years, and in recentmonths they have increasingly stood out as one of the best-performingcategories of commercial real estate.To learn which U.S. markets have the most acuteshortages of smaller industrial space, CoStar ranked the 60 largest U.S.markets based on the composite scores of three criteria: current availabilityrates for industrial buildings smaller than 50,000 square feet; the mediannumber of months on the market of 10,000-25,000-square-foot industrial spacesleased in the past 12 months; and the median number of months on the market ofindustrial spaces smaller than 10,000 square feet leased in the past 12 months.

I'm sure they price the product is based on the potential returns if an investor works the program diligently.

We look primarily at the property and the numbers to determine if it is a good deal.  90% of underwriting is based on the property not the borrower.  

@David Nacco I bought my first investment property from Candace Saunders at Saunders Real Estate Pros, and she's based out of Franklin.

Zillow gave me a rental estimate which is based on 2-beds and rentometer did not include data for 1-beds since it was searching within 1-mile radius.Is it a good thing or a bad thing if there are no 1-bed 1-bath in the vicinity?

It's great that you found a seller willing to accept seller financing now just cover your bases.