You have to consider worst case scenario of not doing well in RE right away. 

BRRRR-ing a duplex sounds like an ideal scenario to minimize risk while building my portfolio.

Things that are common in the U.S. are difficult in the islands, such as U.S. corporations and LLCs are considered foreign entities for tax purposes in the Territory which can cause problems and delays when you go to sell. 

This is the most common oversight by self-managers, but it's the one that could be financially catastrophic.

.- it is important that some of the furnishings are quality including common area seating and mattresses.  

In these scenarios - does affordable housing tend to go with the actual market rent? 

Is this a fairly common occurrence?

I am considering evict my tenant with at fault just cause due to the lease violation ( parking, trash, common area cleanliness).

A common mistake I observe are investors focused on unit count rather than the fundamentals of the underlying real estate that's being bought.

@Albert Johnson We evict one or two people a year in Arizona for various reasons, the most common being non-payment.