Don't want to burst your bubble, but I think you need a more adequate tow vehicle if you are going to seriously consider getting an Airstream. Number one is you must be safe on the road...
The towing capacity of 3500 lbs for your SUV is under ideal conditions, when it's a brand new test vehicle, perfectly tuned up at sea level. Living in Colorado, you will not likely get the same performance towing at altitude in the mountains.
When we started out, we had a tow vehicle that was "rated" to tow 5,000 lbs and our first trailer weighed in at about 3200. The tow vehicle could move
the trailer fine, even on the highways when it was flat. But the minute we hit any
grades it slowed down to a speed that was less than safe on the highway, it would get overheated at with the slightest grade. Not to mention the other issues with towing with an undersized vehicle i.e. braking, wheel base-to-trailer ratio, etc. It last one (very frustrating & miserable!
) trip from Denver to Cheyenne before we got a new tow vehicle.
Also, "dry weight" is without water in tanks, propane or propane tanks, awnings, anything
you put in the trailer or any options it comes with like A/C, TV, etc. You'd be surprised how quickly everything adds up...