One of the problems is that a mid-size business jet (say Citation X or Gulfstream V/G550)costs as much to fly as a regional airliner like a Embraer E170/190($10

One of the problems is that a mid-size business jet (say Citation X or Gulfstream V/G550)costs as much to fly as a regional airliner like a Embraer E170/190($10k+/Hour) due to engine design optimization and is only marginally faster than the E170 in flight time assuming both fly non-stop. Smaller business jets don't have the fuel range to do a coast-to-coast flight non-stop with passengers. E170/190s can be fitted with auxiliary tanks for coast-to-coast corporate shuttle flights.