And, if that isn't crazy enough, you could "exchange" landers, have one coming and one going, sharing an uncrasher stage's propulsion all at once on the same trip. No room at all for contingencies, however, for cargo/resupply this might be possible albeit quite a tour de force.
Secondly, I reject any proposal that abandons its descent stage and engines. The propellant required to send a new descent stage from Earth to LLO far exceeds the propellant required to return that stage from the Lunar surface to LLO.