ISS: It's All Decked Out. Give It Somewheto Go

I would make a far more modest proposal. Use ion engines to gradually adjust the orbit of ISS to something a lot closer to equatorial orbit, and then equip it as a fuel manufacturing and storage depot. The Russians would object to this. The reason why ISS is in the relatively high-inclination orbit it's in is because it's easier to reach that orbit from the latitude of the launch site Russia uses. But if the ISS were in an equatorial orbit, that would make it a better launching point for expeditions to the moon (or GEO, or Lagrange points)as it would eliminate a plane-change maneuver. But stopping at LEO just to stop really makes no sense. It only makes sense ifwe're gassing upthere. I'd propose a system where water could be delivered to ISS (it's safer, and requires smaller tanks). Power from the solar cell array could be used to electrolysize the water to hydrogen and oxygen. Some supplemental heat radiators could function in a cooling and liquefaction system to make fuel and oxidizer which would be stored in shaded and well-insulated tanks. Vehicles bound for higher orbits, the moon, NEAs, or maybe even Mars could dock at ISS with nearly empty tanks, refuel, and continue their journey. It's a bit tempting to propose parking the ISS at the Earth-moon L-1 point, to serve as both a way station to the Moon, and a staging point for departures beyond. But the radiation problem negmarron_99 mentioned would apply here. Manned stations at the L-1 point might have to wait on use of space materials, so that radiation shields of suitable thickness could be implemented in an economical fashion.