The key words here are prop planes, turboplanes, and light jets. Prop planes like the Cessna Caravan are popular because they're roomy (the seats are like business class, and often configured face to face). More popular these days are planes like the six- to eight-seater Pilatus PC-12, and KingAirs, which fly faster and feel more like jets. And then you get into light jets like Learjets, Embraer Phenom 300s, and Citation CJ3s, and Hawkers, all of which are sleeker and more streamlined, and can fly for four to five hours, for slightly longer trips.
When it comes to small planes, weight matters. Don't be surprised when your contact emails you for all passenger weights, and when the pilot organizes seating by weights. (You don't want the three biggest people on the right side, for instance.) Similarly, don't expect to bring two weeks of stuff for a weekend, and definitely mention if you're planning on bringing golf clubs or skis. If they don't fit, check out ShipSticks or LuggageForward, which sends your equipment beforehand for a relatively small fee.
Time saving - this is one of the most significant reasons for using private aircraft. Depending on your program you can have an aircraft ready in just a few hours. You can arrive at the airport just minutes before your scheduled departure time, fly directly to your destination (without any layovers), make productive use of your time onboard, avoid overnight stays (saving hotel $ as well as time), avoid waiting in lines at the airport, land at over 5,000 airports in the US and so be closer to your destination. All of this can provide significant savings in both productive time and in dollars. Productivity - the time savings above provide significantly more productive time, both onboard and before and after your flight. You and your staff can make the most of the travel time to talk business or work with customers, suppliers or partners.
On 1 April 2017, there were 22,368 business jets in the worldwide fleet, of which 11.2% were for sale. 5-year old aircraft residual value level is at a 56% of the list price. A new business aircraft depreciate by 50% in five years before depreciation flattens between years 10 and 15, and the owner of a 15 to 20 years old is often the last, matching luxury cars.