In addition to PH I believe he also checks chlorine level, salt level and total dissolved solids. 

There should have been change orders alerting you of the additional charges, which would have given you the opportunity to make budget decisions.Check your management contract and check all your conversations with the PMC.

In addition, while the umbrella did not end up having to pay out, having it meant I did not stress about it at all.  

These are professionals with additional training and a stricter code of ethics.

In addition to other tax strategies like a cost segregation study on the fully rented out house.

This would depend on whether your property is overvalued by the tax assessor and in turn you are paying additional taxes on that additional valuation.

These will be LTRs and I will most definitely be playing the long game with these.In addition, as rates go down in the future (hopefully) I plan to refinance as most of us do.

Pay attention to the duration.DM me if you want additional thoughts.Jeff

I'm an agent in addition to being an investor.  

In addition your 17 so I am assuming your still at home.