I noticed that nobody replied, so I thought I would add a few comments even though I'm new to this site since I've been offering my property through Airbnb for 5 years now.
My property is a guesthouse, so I would always recommend considering the option of adding a guesthouse if you have room on your property since it's a smaller investment and easier to manage. The owners before we bought our property already converted the big 2 car garage into a guesthouse.
That being said, if you plan to buy a separate property purely for Airbnb, start by ensuring the location is convenient (driving distance) and then begin finding comparables in the area to check pricing and possible demand. Airbnb property supply and occupancy rates can help decide if it's a good location. If you can find demand vs supply information obviously that would help you lots.
You can consider properties outside your driving range, but then you need to have someone manage the property for you.