[gordner]

The Gulfstreams are fabulous machines, but are seriously expensive even by corporate jet standards. I don't think there is a spare for that aircraft that rings in at less than 10K, and spending a million in maintenance is not uncommon.
I work in corporate aviation and we recently received our first G650, we have managed many 450s and 550s before. Gorgeous, but not what I would buy if I had the cash. We run a private 737-500, cost about 10% the purchase price, has 3 times the room, and is in the end less expensive to operate as commercial grade aircraft are designed to make money not cost money, so the parts are reasonable.
And its nice to have a full size bedroom with a king bed, 3 person shower toilet and bidet when you are flying to destination....as well as your full boardroom with seating for 19 at the table. Even the pilots get their own bedroom in the front lol, beside the gourmet kitchen.....