I agree with @Melissa Jolley @Darren Koenenn, Inlet Beach is up and coming - that last stretch before South Walton County gets super expensive! If it's the development I am thinking of, as a new rental, one concern would be guests having to cross over 98 to get to the beach. For vacation rental, homes will earn more $$ the closer to the beach, and the communities that offer a lot of amenities or homes that offer a pool, also produce better income.
If you have not compared these new builds with existing inventory and condos, I recommend you do. You really cannot beat the condo prices right now...at least in the Bay County side... make sure you investigate similar price points or even lower price points with the earning potential of condos, especially ones that have an existing rental history.
Also keep in mind that homes have more maintenance requirements than condos, and insurance will be more costly. Many people look at condos and complain about the HOA fees, but frankly - you will have similar costs for a house. Most Condo fees cover water/sewer/trash/wifi, insurance, grounds, pools, other amenities, management of the facilities, etc. Buying a single family home means you're covering all these costs as well.
Don't forget about the additional upfront costs especially since they're new builds, furnishings, decor, electronics, cable/internet, small appliances, kitchen wares, window treatments, etc.
Lastly, plan an exit strategy - if the STR income is not as high as it was projected, ie doesn't even hit the Good range, then what is your plan? Does the lowest range cover all your costs, PITI, HOA, Utilities, etc... Cash flow is king ...