Charlotte Short Term Rental (Airbnb) Analysis

I am currently helping a client purchase an Airbnb which was pitched as having 70% occupancy at $200 per weekday and $350 on weekends. They also mentioned on average it nets about $4300 per month. When I do my math it looks more like they average 60% occupancy. I know how to find market rates for long term rentals and market occupancy, but I’m green when it comes to short term rentals. Any tips on how to write up a cash flow analysis? Specifically finding average vacancy and market rent would be a huge help. This unit is 3 bedrooms 2.5 baths, with 7 beds.