Brent,
I guess it's a bit over the top but I figure that every man needs a "man cave"

. Yep, the temperature will be something I keep a close eye on. My father-in-law who owns the company that's building the obs is confident that the panelling and roof should do the job though. I guess only time will tell.
John,
The 3 sections are essentially bolted together and completely modular. They will be transported on a couple of flat bed trucks and reassembled. Yep, plenty of space for the trucks to get in. The obs will be located behind our horse padock so manuvering shouldn't be an issue.
I'm certainly looking forward to relaxing on the veranda on a clear night

.
I am currently working on updating my website to include a section on the obs construction. The progress can be tracked here:
http://www.astroromp.com/astronomy/observatory.htm
Cheers