@Account Closed said, within the proper city limits of Destin some ordinances have recently been passed regarding short term rental homes in residential areas. Be sure to pay attention to the number of parking spaces, the max occupancy limit is now 24 but it is dictated by the total number of bedrooms, etc. Your current agent should be aware of the details. There is a grandfather clause that lets properties stay at their current occupancy limit for the next 5 years, but as of the second reading at the last city council meeting 2 weeks ago, it wasn't clear whether that grandfathering conveys with the sale of the property.
Be sure to reach out to the Property management companies directly and request your own projections, ask your own questions, etc. Cross reference projections and ask the management companies to explain the differences. It will help you gain some perspective on which one is more realistic and they can also tell you the positive and negative aspects of a property from their perspective as well. The startup costs for linens and other things can be a big surprise to many first time investors, so it would behoove you to do your due diligence on all the associated costs before submitting an offer on a property. Get stuff in writing, keep good records, etc.
Feel free to reach out if you have any other questions.