I started vacation rentals when I bought at the top of the market and had to relocate but couldn't sell. Vacation rental route was the only way I could turn my situation into one that covered the bills. This was long before AirBnB was around.
10 years later, it's still going. I've wanted to get more, but...
AirBnb has been a blessing and a curse. More people are staying in vacation rentals, which ups my bookings and my rents. Yay! However, because of the popularity of AirBnB, many cities have or will put rules in place that make running a vacation rental difficult. In my neck of the woods, some cities say absolutely no rentals less than 30 days. Some cities say no vacation rentals at all! And many HOAs here enforce limits on rentals as well. This hurts you because most people don't take 30+ day vacations. And while you might buy in a place and be running a gold mine, it's scary to know that at any time you could be shut down because of a change in CC&Rs or city ordinances.
So, when and if I purchase another place for vacation rental use, I'm going to want it to cash flow as a long term rental, just in case I can't operate it as a vacation rental anymore. I'm sure it's different for every area, but here, it's a sad reality that needs to be considered. Therefore, I would not buy based on vacation rental numbers.
That said, if you can find places that would do ok as a long term rental and you furnish them and rent them as a vacation rental, I think you could do very well. Worst case scenario, you end up having to switch over to long term rental. But it could be a great way to keep buying rentals since they give off so much cash. That's what I'd like to do and keep it going for as long as I can. Then hold if/when the vacation rental party is over.
-M