In the last group of candidates interviewed only 3 of 8 were selected.
As far as next year goes, the numbers vary from 20-40. They don't even know themselves. If business continues as it has the last few months then we may see even higher numbers, who knows. Right now since the company is in transition with ownership, there are more questions than answers to benefits, fleet, hiring etc. Over the next 90 days the picture will be clearer.
As far as the interview goes, in general just know what you are getting into. Fractional/91K isn't for everyone. Be positive! They really want people to be happy here. Focus on customer service #1.