Thought I might add my experience. I had a helper, and have trouble seeing how one person could do it. As far as what to put it on, I had a 12 x 12 concrete slab poured for it and it arrived right at 6 weeks after I paid for it, which I was told it would be. No instructions and the ones I found to download left a lot to be desired, along with being just drawings. Assembly was quite frustrating for me due to the fact I had to really fight, pull, and push to a great extent on every dome hole.The ones where you had 3 holes to get the nut through were the hardest of course. Using a small screwdriver (to pry) helped me get the bolts into the holes. I also had to drill in order to enlarge holes for the wheel bolts. When it comes to hardware, I was short several big NB washers, regular washers and a few lock nuts. But I also ended up having lots of hardware left over.. Total construction time was right at 12 hours (and I had a structural engineer helping). Overall, assembly was a huge pain but I am pleased with the finsihed product. I was either going to go with a Sirus observatory or the Nexdome and for the money, I don't know of any other dome out there I would have gone with and would recommend buying this dome to some one. If anyone had a trouble free 3 hour assembly (as seen on YouTube) I'd like to hear abou it!
Can you post a picture of the Nexdome on the 12x12 pad? I'm trying to decided if a 10x10 pad would be sufficient for a Nexdome with 1 bay, or if I need to go bigger.