Do it then. Nobody else in the industry seems able to.
When it comes to space programs and launch costs/waste, SpaceX is at the bottom of the list. Nobody puts stuff in space cheaper than they do. And not by a small margin.
For comparison, the cost for SLS to launch into earth orbit is $4.1B. TO LAUNCH. Development costs for that program have exceeded $27B. They have been working on it since 2011. It has launched exactly one time over a year ago.
The entire contract to SpaceX to fully develop and launch a moon lander is less than the cost of launching a single SLS rocket.