The X-15 Space Plane had a top speed of Mach 6.72 (4,520 mph, 7,274 km/h) a service ceiling of 67 mi (108 km, 354,330 ft) and a blistering climb rate of 60,000 ft/min (18,288 m/min), the space planes were fuelled with liquid oxygen propellant and hydrogen peroxide.
$595,000 USD will buy you a modest suburban house in most parts of America. Well, it could buy you a modest suburban house. Or it could buy you your own private freaking jet. I don’t think it’s a particularly difficult choice, I mean the plane has seats that fold into beds and a kitchenette but the modest suburban house can’t fly. 1-0 to the private jet.
