With your costs being less you can invest more into the property to build reviews and get bookings. 

Read my book.2.

Build a strong team with experienced lenders, real estate agents, and property managers, and educate yourself through books and podcasts.

The tourism authority has had some good information in the past about how many visitors come to each island and, of those visitors, how many book STRs.

I have also read alot of books. 

Just make sure you are saving towards those slow months during the peak months, buy a deal at the right price (don't overpay just because its a turnkey STR or you think it will make more money than projected), and look into ways to increase bookings during those slow months with some marketing and operation tweaks. 

I would suggest starting with reading the IRC book all the way through multiple times.

@Dennis KnappJ Scotts book on estimating rehab costs is a great start. https://store.biggerpockets.com/products/the-book-on-estimat...Here is a "general" rule of thumb for my market in Jacksonville, FL.

A lead magnet is a powerful way to capture their attention.Examples of Lead Magnets:“Free Guide: 5 Ways to Sell Your Home Fast Without a Realtor.”

Most of the time a newer or unsuccessful agents will host open houses as they build their book of business.