Is that particular parcel too small to build extra accommodation? I'm sure plenty of people would love to stay in a dome, myself included!

As for New Mexico, I'm not sure, but I know I've wanted to go ever since I found out that there is an artwork located by Walter De Maria, maybe you are familiar with it? I don't know how big New Mexico is exactly and if it's far from where you're thinking to build, but it's called The Lightening Field. As far as I know people from all over the world travel every year during summer/autumn to visit it. I posted a video of the artwork and wrote about the artist here a while back.

I can see the same people that travel all the way to New Mexico from all over the country and world to experience this artwork wanting to stay in a dome home, might be a market there :-D