Need to watch out for utilities like water meter, electrical, gas, and sewer.

The only thing is, he mentioned that I will have to file an extension because, understandably so, he does not have the time to complete my small business returns by 3/15 (8 days from today).

Why is the wholesaler not giving you an extension?

Personally, I wouldn't offer SubTo or a Wrap, For reasons I've written about fairly extensively. https://www.biggerpockets.com/forums/70/topics/1227199-the-m...However, I would sell on "Lease Option" and that may work for you.

There is the Experian Boost that adds monthly utility bills as credit and various apps and facebook groups.

Sometimes they'll have gurus come thru that charge more for a full day class or more extensive training.I've posted before some lists of area meetups...each has a little different twist and following. 

As a would be individual landlord with just a one unit single family property I don’t know I can stomach the risk or withstand a financial assault resulting from an eviction process for a non-paying tenant (or tenants that do extensive damage).I am seriously considering bowing out and selling.

It's been great - the property is 100% paid off and the house is worth 300-340k generating approx $2300/mo (that's after utilities/management fees etc.)I'm considering selling the property to buy 3 more within the same price range in the same market. 

My partner and I keep an excel spreadsheet of rent, our purchases, utilities, taxes, insurance, and money spent on contractors.

To add value to the property, we undertook extensive renovations including the removal of over 40 yards of trash, installation of a new septic system and wall-hung boiler, and a new well pump.