Bombardier Global 7500

Especially since the operating cost is $16,000 per hour… ( https://compareprivateplanes.com/articles/bombardier-global-7500-ownership-operating-costs ) More on reddit.com

The coolest fact I know of about either aircraft is that Gulfstream leveraged expertise from their parent company's submarine business : You might be surprised to learn that the G650's low cabin sound level (well below 50 decibels in flight, by unofficial estimates) was achieved, in part, by bringing in acoustics experts from parent company General Dynamics' nuclear submarine division in Groton, Connecticut. The sub specialists applied what they know about making ultra-quiet submarines — literally a life or death proposition to the crews who must go undetected underwater — to the business jet interior. The results were nothing short of amazing. John Maxon, who heads Gulfstream's state-of-the-art acoustics test facility in Savannah, Georgia, was one of the sub specialists brought over to achieve the dramatic improvements in cabin noise in the G650. He helped enlist a couple of other submarine noise experts to join a team that has grown to a dozen dedicated engineers at Gulfstream who work on nothing but cabin acoustics research. "There's so much thought that has to go into making the cabin quieter," Maxon said. "Acoustic noise sources include turbulent airflow, the engines, environmental control system noise, even the overhead gasper that controls the air above the seats. We worked hard with the cabin distribution system, the air ducts, pumps, everything you can think of, to make significant improvements to reduce all that noise to almost nothing." More on reddit.com

GBX 7500 ad hoc charter rate about 12k/hr. As a rule of thumb, fractionals and jet cards charge about twice the ad hoc rate for your live legs, since you are not billed for repo legs. This is why jet cards and fractionals do not make the best financial sense if you live in an well-supplied charter jet market. At 150-200 hours per year, looking at options other than ad hoc is customary, but if each of your trips is 15-20 hours (which I assume based on typical mission for a GBX 7500), translates into maybe 1 trip per month, you could save money if you team up with the right operator/broker for ad hoc. If more frequent monthly trips and service consistency is your focus then stick with NetJets, who has a much better service reputation than Vista, where service levels have declined quite a bit in last 1-2 years with their rapid expansion. More on reddit.com

Part 91 flights in the USA have no duty time limits or rules. But usually smart operators have augmented crew which is why there’s a crew rest area as well. More on reddit.com