Where are they most common and are they tests that can be done.

The HOA fees cover these.This has been tested many times before, a mentor of mine who has been a landlord there for going on 4 decades that having a property management is not cost-effective and generally a bad idea - in that particular location.I don't like the idea of giving up $3,000-$5000 per year, per property, to do less than $500 worth of work.These aren't the typical high management intensive single family homes in the Midwest.As I was saying before, why would the time difference be such a big issue?

While STR are very labor intensive due to the frequent turns, they can also be very profitable.

We all meet the ownership and primary residence eligibility tests.

What matters is meeting the two prong test as a real estate professional, documenting that for substantiation purposes, and determining if material participation can be met.

@Jan GatesHave you tested this recently?

If you have no loan on the books, then for all intensive purposes you bought the property with cash from your business. 

.- Perform radon test every 5 years.- Perform sewage line inspection every five years, especially with old, established trees in obvious vicinity to sewer line, maple root systems are typically shallow and extensive (<5 feet)/oaks go deeper and never stop growing even if the tree branches keeps getting trimmed back (>5 feet).- Monitor typical icicle build-up, watching for insulation/roofing degradation.- Glyphosate weedkiller application 2x yearly, early spring, midsummer in problem areas.- Check window trim for wood rot (I have a constant bone to pick with window replacement companies that offer window wrapping for older homes, completely hiding existing trim as it degrades further and lets in more cold air!)

There is percentage test that applies.

You can go higher but then you start getting into some intense structural engineering with steel which will just up your price per sqft on construction.