Something to consult a CPA about is the tax write offs.

I use the rental calculator all the time to analyze deals as well as some of the other features and then write off the costs as education at tax time.

That's how the tax man see it.

A lot of these markets are also landlord friendly and offer lower taxes as well. 

What are some strategies you recommend to avoid Saturday check-in or check-outs splitting the weekend? 

Is your DSCR ratio greater than 1-meaning are you cash flowing (according to the lender's criteria of mortgage, property taxes and insurance (and HOA) if applicable).

Property Tax GIS system. 

In theory my only costs would be purchase of the lot + associated fees, taxes, and engineering services (which I could do a portion of on my own time). 

(lower PITI) Get cheaper property taxes - argue with county with a Property Assessment Appeal that your home is worth less than what they appraised it for, thus lowering your property tax burden (portion of your mortgage payment)4. 

Tenant must keep the premises heated and turn off water to exterior spigots in cold weather to avoid freezing pipes.