Realistically, buy a Cessena 182. The 182 can carry 4 people and luggage. A goood one will go anywhere between $50k-$120k depending navigation equipment and condition. Keep in mind it will cost you to maintain an annual FAA certification. Also, since it's fixed gear (not retractable) you'll save money on insurance.

If money is not object then buy a Boeing Business Jet. It's based on a 737 with blended winglets. It has a crazy azz range and is large enough to have your bedrooom, entertainment area, and whatever else you want.

Other nice planes are Gulfstream V, Bombardier Global Express, and Citation X.

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11 X5d JB/Cinnamon w/Bamboo/Premium/Tech/Cold/Rear Ent/Rear Climate/iPod/Roof Rails/Running Boards