Laying up glass using a 24" sonotube as a mandrel wouldn't be terribly hard with the right rig. It would take a few hands, but I think something like Jim Jarvis' setup for rolling carbon tubes would be pretty effective. You'd probably want glass rather than carbon for cost-effectiveness. The coupler and nose cone are harder, but you might be able to do an internal layup once you have the tube laid. 24"-30" is an awful lot of room. On the other hand, you might be able to do a HED-style deployment out of the nose cone with no internal coupler.