If you're just going to respond to this to add that this is a stupid idea, Then please try to restrain yourself...
OK
The idea is to put a single astronaut in a suit, or very small capsule, into low Earth Orbit, for 2 or 3 trips around the Earth. Cost ???
First: Build a HUGELY HUGE, REALLY HUGE, WITH THE IDEA OF BEING HUGE IN MIND... Helium Balloon Shaped like a Donut. Oriented while in use, so that the Hole in the Donut is Perpendicular to The Earth. So looking up, you could see Space, looking down, you would see The Earth.
Second: You build a Platform under the Balloon with a common Rubber Tube Slingshot attached, So that when the Balloon is at it's apogee, which is aided by heating the helium in the balloon, You slingshot the astronaut into orbit, through the hole in the balloon.
Third: The Balloon is tethered to the Earth by a very strong fishing line, So that the helium in the Balloon is cooled, and the donut is reeled in, for reuse.