Why would you want someone else to build a kit airplane? Part of the fun of kit aircraft is the time you spend building it!
My recommendation: Buy a certified aircraft if you aren't interested in building the kit.
I'm a hobbyist, so I only fly for fun. So if I can take my time getting to my destination, I just gas up my LSA and go. However, if I have to get there, it's the airliners for me.
So I've been without my ADD meds since High School (I'm 29 now) and I'm currently flying under sport pilot rules. Recently I've been contemplating taking ADD meds again because I'm tired of having a mind that has 500 browser tabs open and I'm trying to view all the tabs at once...
You can save money by scratch building from a set of plans, but not all of us are that mechanically inclined. I can do a kit (plan on doing a kit), but building an aircraft from scratch, not my forte.
http://whatsnext.blogs.cnn.com/2013/07/29/open-source-airplane-could-cost-just-15000/
Haven't seen this posted on PoA today.
Honestly I'm skeptical of the $15k price tag. I think most ultralights cost more than $15k, and you can't get a decent homebuilt LSA aircraft for less than $40k...