All of the info on these sites originates from the MLS systems that NAR controls.

People will stay in the smaller areas to avoid staying in the high traffic areas of the beach goers. 

I'm looking for resources to learn more about these areas and would appreciate any advice or recommendations.

I recommend finding out who installed the system and contacting them.

@Selina GiarlaI recommend finding an accountant who specializes in real estate taxation, business taxation, tax planning and financial planning.You may want to consider working with your accountant remotely to expand your options.I would also recommend looking for a accountant willing to work with you throughout the year.

Investors way more experienced than me suggest building a portfolio of high quality properties that produce well instead of a ton of low quality under performing properties. 

Do you have recommendations for low cost options to post a 10 day notice on the property? 

In the Seattle market, condoizing costs around 15K (survey, site plan, recording fees, legal fees, HOA creation and coaching from lawyer, setting up utility sub-metering if required).

They also have a pulse on who in the area has successful property management businesses (maybe themselves)3) Search direct booking sites in your area on google like "Vacation Rentals In Allentown" and see if websites pop up that are not airbnb or Vrbo you could reach out on.

-Any tips for identifying promising BRRR strategies?