It's crazy that Airbnb even allows Instant Book to be activated for first-time hosts. So many cancellations and customer-service calls could be spared if this feature were blocked until, say, 5 consecutive successful bookings.
@Ray1437 Before considering stays of over 30 days, you had better make sure you're very familiar both with how Airbnb works and how Florida law applies. Airbnb only collects the first month's payment at the time of booking. If they aren't able to collect payment for the next period, the only thing they can do is cancel the remainder of the reservation. But what if the guest refuses to leave? They may be protected by tenancy rights, and require a lengthy and expensive legal process to evict - none of which Airbnb can help you with.
Scammers and squatters are very well aware of this, and as a new host who hasn't quite learned the ropes, you're going to be the prime target.