If the crash is out of reach, let them hire some jets to reach, parachute out, as it has been stated before, add in jean lucs idea about cheaper bases, so if they para out you will have to make a base nearby to collect them again, it will also encourage people to make more bases, and the ball is rolling:)
A dirt track to land on, quickly erected barrack, a mobile radar installation as the first cheap start of a new base
Also stellars idea seems the best to train new rookies. the bell curve