The obs. is oriented with long axis E-W with the warm room on the W side, since the prevailing winds are out of that direction in this part of NM. (So far all of the GG structures are built this way, although some are going to be N-S in the future.)
The design is for 5' of the long walls to be fixed and the upper 2' to roll off with the roof. This will give better views in all directions except due E and W due to the overall length of the structure (24' E to W). The E gable end will be fixed and will not move. For observing directly to the E or W or near the horizon I will roll the dob outside to the observing slab which will have full views except back toward the observatory.
I'm attaching my sketches as a PDF file, of course comments are welcome. You can see several completed observatories in the background of the original picture, but I think mine will be the first to have part of the walls roll off too. There are about 100 of these sites in total, each on 1/4 acre of leased land (99 year lease). There are also going to be RV sites. I am not affiliated with GG other than being an observatory site owner (lessee actually, for 99 years). GG is an educational corporation, they are also building a museum, doing a lot of outreach to the local schools, etc.
For now, I'll be occasionally flying on Southwest Airlines to El Paso (3 hour drive to GG) to stay for about a week at at a time. No plans at the moment to make it remotely operated, although maybe in the future. It was a tough decision to build so far from home but in the end the skies and remoteness, plus the community of other observers, won me over (and of course my wife liked the place too even though she has no interest in astronomy!) We got the option that includes 6 months of lodging per year in one of the group of Park Model homes that will be set up near the observatories.