Doesn't look like a good idea. Short term rental is not so profitable business at most parts of the world. It's more like a hobby, not like a full time job. Running a successful STR business will just tell to your future manager, that you will not depend 100% from your full time job and you are free to quit any time, if you don't like something-a complete lack of "corporate culture". Some part of your energy and attention will always be on your airbnb listing.
On the other side...every hobby is cultivating some skills. The next question is how valuable and specific they are for the specific job. Maybe the "airbnb" skills are important...somewhere, for somebody, for a very specific job...and if the person on the other side knows what is Airbnb and short term rental at all.