You might be interested in this or know something who is. It’s a collaborative effort to build machines. There’s also the list of links that I posted earlier in the thread.
Machine Builders Network
http://kramerville.net/mbn/
I’ve also seen quite a few repair and home build projects at the following. Ignore the ads.
TractorByNet.com
http://www.tractorbynet.com/forums/
Thanks! We still have a few young tinkerers around these parts, thankfully. One of my granddaughters is dating one, another is engaged to one. (Makes Christmas easy—tools or gift certificates for more of them).