The original plan called for two aircraft and a more robust schedule. Most airlines want 8 to 9 hours per day utilization.
I looked again at the performance numbers. If you can get the best routing possible your looking at 1050 miles. 85 people with 50lbs of luggage is 18,700lbs using 170 lbs per person. The problem is this aircraft can't climb nearly as high as other jets. It's not going to be on top of the summer storms and need lots of deviations. Fuel is going to be very critical every flight.
The other issue is reliability. There were about 380 of these jets built. There are only 70 left flying. There are zero in N America. Parts are going to be hard to come by. Pilots are probably going to have to be sent back and forth to Europe for simulator training. That gets expensive.
I think in the end they would have been better off purchasing new Bombardier CS100's. It's a far more capable aircraft that would have opened up routes to anywhere in the Eastern US. It's also going to cruise at about 120 MPH faster.
The entire project reeks of a shoestring budget. Airlines operating that way rarely succeed.