Your apparently bad experience does not match up with my knowledge of the handling of thousands of claims which for the most part were handled appropriately. 

Applying those principle, focus your energy on doing the preventative things on a day to day basis that reduces the risk of claims from occurring in the first place  (siginign vendor agreeements /collecting insurance certificates) and carry appropriate levels of insurance.

Which one is appropriate for different situations? 

Keep an eye out for indicators of population increase or steady housing demand.The BRRRR approach may be appropriate for older properties, particularly if they require renovations.

Are houses in that location more appropriate for long term rental? 

What would be the appropriate way to go about this?

Knowing your goals can help you choose an appropriate investing plan.Participate in forums, attend local meetups, and network with seasoned investors to become involved with the BiggerPockets community.

Then I have standard 12-month lease that covers me and my condo appropriately. 

The bill would exempt nonprofit organizations and other entities primarily engaged in the construction or rehabilitation of housing from the definition of “investment entity.”I'm curious on what everyone's thoughts are on this.

Find a property with 20% Cash on Cash return and appropriate monthly Cash Flow.