Wow! If $2K is your budget, you can get a VERY NICE setup. We looked long and hard for ours. An Ironman4x4 roof top tent with an annex room is currently $1,195 and their awnings are around $250 depending on the size. Here's the link:
http://www.ironman4x4.com/html/rooftop_tent.html. Ironman4x4 is a relatively new player in the Australian and U.S. off road markets, and they have impressed us with their quality and pricing. They're aren't that many competitors in this market, but the competition seems to be heavy.
We recently bought ours through ACC Toyota Lexus & Land Cruiser and couldn't be happier with it. There are other quality brands out there, and we could not see any quality difference between ARB, Cascadia, Mombassa, etc. In fact, the measurements and tent styles are exactly the same in most of the models. Here's ours mounted on a small 1/4-ton trailer with some pictures showing the tent folded.