The builders up there are definitely not equal although they will all claim their cabins are all "rental ready".  

At a bare minimum, I would require a written lease agreement and a standard security deposit equal to an entire month of rent.

This is a false statement that leads @Neal Coppola down a false path of belief.

This makes my blood boil beyond belief.

How to you properly charge the tenants seasonal usage (high in winter/low in summer) and when there's not equal gas appliances between the units? 

So my point would be that the appraised value isn't always equal to actual value on a purchase appraisal.If everyone is month to month you have a lot of flexibility to go back to them and say, "Hey, we just got the property tax increase for the year and this will necessitate an increase in rent to $X,XXX/ month.  

Your current asking price for rent is equal to your mortgage.

One point equals 1% of the loan amount, so on a $100,000 loan, 2 points would be $2,000.

For primary residences, taxes paid equal 4% of the fair market value of the home times the local millage rate plus any other local district taxes assessed, such as for fire or police, but with a school district tax credit.

This is also my belief.