[glend (Glen)]

Based on my thirty years in Canada, insulation is not going to be much use when the roof is rolled off, and with it closed it will be very difficult to seal against -30C temps. It would appear from the last photo that the roof may have foam planks or insulation batts layed lengthwise but i can't see that being very effective in winter when any little opening, like the roof track one will allow cold to pour in. Snow load shedding will be an issue for roof design as well. Full remote control is a necessity, you'll die standing around out there without artic clothing. Power systems will need to be reliable and batteries are out of the question at those temperaures. Will you be heating the mount in some way or going to low temperature full synthetic grease? Mount tolerances can also be an issue and heating the mount maybe necessary. Suggest you get operating temperature specs for all your equipment, especially the EQ8, filter wheels, focuser motors, etc if your imaging. Most mounts makers that publish operating temperature ranges don't go below -20C due to bearing grease seizing, differental expansion rates of the metals etc. Finally, do not move telescopes, eye pieces, cameras, etc from warm houses to very cold observatories, the swing from +20C to -30C will cause thermal shock and potentially damage the equipment - leave it at ambient in the observatory.
Jussi I suggest you post this thread up on the Cloudy Nights Forum as well as here, as they will have many more members experienced in extreme cold astronomy and observatory operation in extreme cold.