Investor returns over the long term are very important to us - and crucial to our long-term success and growth. 

Very important to know.

I would just go on VRBO (or similar) and look how people design their properties where it really matters (they are trying to rent to daily guests and design/amenities are super important.

Hey @Grant Woodward, you can never be too cautious when it comes to guest safety like @Lauren Kormylo said.There are dozens of things at your STR that could cause an injury or worse so making sure all the ducks are in a row and quackin' in unison is one of the most important things you can do.Like @John Underwood said, make sure you have a rock solid insurance policy that covers the pool and adjoining areas.

She is renting the apartment, not the entire property.It's very important for landlords to understand Landlord-Tenant rights and maintain control of the property.

Important resources(articles, books, podcasts) to review?

I understand how important it is to resolve this matter promptly.I want to address your concerns regarding the delay in processing your IC Membership refund.

Decide what is important and what is not.

Verifying last 2 years of rental history very important!

You should reach out to @Melissa Haworth she can get the actual numbers/rents on STRs in the area to help run your comps.Each building is different, each area is different, it is important to find accurate data to make good decisions.