You can't do anything like space colonization on the cheap. The current manned space program isn't very expensive in the grand scheme of things, but it's hardly

You can't do anything like space colonization on the cheap. The current manned space program isn't very expensive in the grand scheme of things, but it's hardly space colonization. Low earth orbit is only 250 miles away. If you get started right after breakfast you can go that far on a bike.