cheap lunar gear & base (spin-off of superhero flight)

Ok, the suggestion was made of the super in my prvious question
setting up a "base" on the moon. (An idea I'd already had)

It's a great place to stash stuff you don't want folks to find.

Thing is, while she can protect stuff from the local conditions while
she carries it, that doesn't help when she leaves.

So first need is some sort of relatively cheap, easy to obtain
container that can hold a 1 bar pressure difference.

Any chance that any of the amo cases or the like you can find at gun
shows might work?

Second, suggestions on how to build a shelter to even out temp
differences. Assume no parts bigger than a standard sheet of plywood
or heavier than a couple of hundred kilos.

Third, cheap pressure suit for any visitors she might haul up there.