Yep,I have turned my hubbys old work shed (let's face it it was never used as such!) And have 18 girls in there very happily,& it doesn't have to be a mite haven as we haven't had more than a small number of mites in 2 years.
Lino on the floor works for me too, but I diatom under it,and throw it around the place, under my nest boxes too.the nest boxes are totally removable & when I built them I Vaselines in all joints, & keep all nooks & crannies Vaseline coated.you can see the extent of your mite problem easily when they are caught there! I love my shed, so easy to work in & airy!