Space habs buried under the moon's surface

In spacesettlers@yahoogroups.com, "pan p"

> And then there are the energy costs to keep the thing spinning.
>
> Even with magnetic bearings, the energy costs are thru the roof.

According to who? Actual numbers? The spinning surface settlement
is going to be consuming lots of energy to start out with, for
lighting, heating/cooling, etc.

I don't think the idea of spinning hubs for providing 1 G on the
moon/mars has been studied in any kind of thorough engineering-
oriented way. Or if it has, I'd like to know where the studies can
be found.