I have only been following space elevator research cursorily, but it seems to me that this proposal lacks the most compelling reason for building a space elevator: breaking the bonds of Earth's gravity well. The most expensive part of space travel now is getting from the earth's surface to a stable orbit, and a space elevator from the moon does exactly nothing to reduce this cost.
It does still have some benefits, i.e. if I'm not mistaken you could still use this elevator to "slingshot" spacecrafts on interplanetary trips, and it would make it cheaper to get to and return from the moon. But it's unclear (to me) whether these benefits could actually be realized when the cost to get to the space elevator in the first place is still so prohibitive.
I guess what I'm saying is that this is just the cost analysis, not the full cost/benefit analysis. The costs may be a lot less than a space elevator from the surface of the earth, but the benefits are a lot smaller too.
It does still have some benefits, i.e. if I'm not mistaken you could still use this elevator to "slingshot" spacecrafts on interplanetary trips, and it would make it cheaper to get to and return from the moon. But it's unclear (to me) whether these benefits could actually be realized when the cost to get to the space elevator in the first place is still so prohibitive.
I guess what I'm saying is that this is just the cost analysis, not the full cost/benefit analysis. The costs may be a lot less than a space elevator from the surface of the earth, but the benefits are a lot smaller too.