"Buyers" like that will only frustrate you and leave you working for nothing. 

You must obtain and pay for all other utilities.

We were told the offer was shared with the seller, one refused, the others never responded back.All offers we make clear that the lease is only until closing which we anticipate taking 9-10 months.

This type of tenant will walk all over you in the future if you don't stop it now.

What did you say in response to that? 

I believe it is gathering STR data which is only partially relevant.

A 8-10 unit (when you can find them) range about 3 million. 

Quote from @Raymond Whitley: Not sure if Goosehead is in your area, but a broker like someone at this company can really help you in challenge times for insurance like this current market with so many carriers dropping out completely or raising rates on everyone. 

Get a cheap course, join a good brokerage that has enough full time agents that will help you by taking you under their wing - that is going to teach you more than the course you buy and take. 

Just from the way you presented your intro, it's clear you are driven and passionate about real estate.