I might know of a xenos for sale. Happens to be the prototype for sonex . My buddy bought it from them and might sell.I'm about the same age. Though my dream was to design and build my own. I somewhat did that, but have other asperations that are on the back burner. In the meantime I have a Piper Cherokee 140.
As was stated in earlier posts, getting a C172 or Cherokee 140 is generally way cheaper than a lot of kit (finished) and you can fly now. I also want to build, but for now I fly. Maybe I'll get a Onex or work on a motorglider design.
btw, I'm luke warm on the C152. I found them kind of fun to fly and cheaper, but the useful load is not particularly useful, like the Sonex, IMHO. A C172 or PS28-140, you can have two adults, 4 hours of fuel and baggage. They might be a big sluggish, but I can still get you sick if you want. Yes, I find the T18 and GP4 sexy, but I'd consider an RV (I'm partial to the 7, 9, and 14).