Is anyone aware of vrbo or airbnb providing personal data to municipalities?

The STR is still booming in many coastal municipalities but there are also opportunities for Fix n Flips.

Life/safety obviously should have no limit.

If you want municipal maintenance, then you need to design and build to municipal standards so that the City will own and maintain these items.

I agree: contact the presiding local municipality(s) and confirm the process and requirements.

Basically they limit anything likely to increase the usage on the septic.I think I would start by investing the limitations on your current septic system of if there is a nearby sewer that you can tie into.Depending on the constraint on the septic system, maybe an increased leach field or a ATU can address the limits of your current septic system.Aerobic Treatment Units (ATUs) are similar to standard septic systems in that they use natural processes to treat wastewater.

Many municipalities reassess at sale.

For instance, most municipalities require snow to be cleared within a set number of hours of snow fall.  

Downpayment usually of 30%, 15 year term loans, but interest rate varies around 3.5% by municipality.  2.  

It also depends on your management style, old guys like to never raise rent and never have a vacancy, newer investors like to push the limits of what rent they can get, and as a result, often have higher vacancy.