Why a Beechjet 400A? Unless you have some of this type already, I would suggest that you sit down and discuss what your exact requirements, what airports are you going to operate from, what type of routes, number of passengers and baggage, then you can assess what aircraft are suitable for your requirements based on various parameters such as "suitability", "availability""Purchase Cost" "Operating Cost""Reliability""History of the type"..
After all that, you can decide that the Nextant 400XT is the most suitable for your requirements
Mutt