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.

Then negotiate based on that.

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.

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.  

Most military families choose to live in the city of the base they will be working on. 

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

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?

Regarding utilities, You could do based on square footage.