TAXI PORT
Moon bound travelers will transfer from VTOLs to Taxis in LEO at taxi ports-non-rotating zero-G space stations where taxis are also fueled up and serviced.  At L2 there will be a taxi port where travelers transfer to Moon Shuttles and descend to the lunar surface. 
Rescue Ship
What if taxi rocket motors malfunction and the taxi fails to rendesvouz with the cycling station?  What if the taxi is stranded in the Van Allen Belts?  We cannot let the travelers die!  Rescue ships with nuclear propulsion and zero-boil off water for reaction mass will race to the rescue.  These ships will be based in GEO so that nobody on the Earth below feels threataned by nuclear reactors in the sky.
ABOVE) Large taxiport. Gallium Arsenide solar panels generate 12 MWe, but only half the time when the taxiport is on the dayside.  Power during passage thru Earth's shadow comes from fuel cells.  That's enough to power over 4,000 average homes.  Lots of electricity is needed to light and cool the station and run the LSS.  Also, power is used to reliquefy boil-off from monopropellant tanks and run ion drives or electrodynamic tethers that overcome the slight atmospheric drag at 600 kilometers altitude.  A similar taxiport at L2 uses ion drives,mag and solar sails to stay on station, since L2 is a bit unstable.  Large main dish tracks one of three large relay stations in GEO that links with other GEO relays, ground stations, L1 and L2 stations, and space craft in Earth orbit and in Earth-Moon space.  Needless to say, the GEO relay stations have some massive antenna farms to keep track of all these other stations and ships in space. 
More Taxi Diagrams