The most common is leaning on your agent for their expert advice.

It's a new resource from BiggerPockets that helps you find reliable property management partnerships and gives you everything you need to make confident hiring decisions:-Expert Matching: Match with professionals who meet your criteria-Extra Assurance: See licenses, experience, ratings, reviews, and more that can be cross-checked with BiggerPockets members-Bonus Content: Plus they'll send you an interactive workbook: “How to Interview Property Management Companies”Hope this helps!

Coincidentally, I’m currently listening to the BP Real Estate podcast, Episode 1,054: The Expert Investor: Early Retirement is a Mistake, Rent Instead of Buying.

Send a certified letter today so you can prove that they received it.

If you aren't an excel expert I wouldn't bother trying to make your own or scour the internet for an analyzer tool that may or may not meet your needs. 

For the HVAC, I'd just question if that's the correct and best way to go about it, but I'm not an expert, but certianly you won't get interest listing a unit for rent or sale without HVAC.

But if they gov't changes to a 90 day minimum, you would have to operate as a 90 day rental or longer.And talking to local experts, if you want to own a STR on O'ahu, your safest bet is to buy a unit in a Condotel that is located in the "Resort" zone of Waikiki.  

The solar system adds no value to my property for rental purposes, and I may even be ripping up the roof & replacing it in the new year.Beyond sending a nasty letter through my attorney via certified mail, demanding the company come pick up their equipment, am I required to take any further action or fulfill any obligations regarding these contracts?

This plan covers 24/7/365 troubleshooting services from Lula's experts (such as guidance on resetting a circuit breaker), tenant coordination for scheduling repairs, and access to a network of vetted professionals.Once you're subscribed to Lula, you can set aside a pre-approved amount for repairs, which can be used without needing to contact you as well.

Post on local Facebook pages for contractor referrals, go to local REIAs, and ask your potential agents and PMs (even if not using a PM at first...you may at some point).There is only so much that service providers can do and many of them are far from "experts"; so, be prepared to be your own expert at being willing to figure stuff out as you move forward.