Beautiful work..
It is reminding me of my own humble shed put together back in '80-ies (it does not exist any more, possibly only the pier is still there, it was part of 0.7 metre concrete cube buried in the ground)... The shed was on rails and wheels so that it was possible to roll the whole thing over the scope, which was left on the site during the observing season and the door could be closed....
I intend to build something like that again (if my ministry of finance and foreign affairs - present on the attached image - agrees to this plan

)