My wife and I bought our home less than a year ago. While we were looking for something we were absolutely disgusted with the lack of decent affordable modern housing. Basically it doesn't exist. We opted to buy a tiny home in a good neighborhood, and do a modern addition to it (more on that soon, plans are almost done). For those of you living in the Denver area, check out 5280mod.com Colorado based realtor focusing on modern housing. While everything might not be affordable, at least they will know where you are coming from.The pics to the left are of a ufo home (I remember one of those in dwell) for $129, and another mod influenced MCM home for $210.
Also check out Shannon's blog on livemodern.