I would encourage you to get in touch with a reputable custom frame builder and describe your situation and requirements. The local shop I use has been in busin

I would encourage you to get in touch with a reputable custom frame builder and describe your situation and requirements. The local shop I use has been in business for nearly 50 years, and they use components that I can best describe as "tried and true." A bike they built for me in 2014 is something that I can still fully service myself with commonly-available parts and tools. Meanwhile I damaged a thru-axle of a high-end big-name brand bike (rhymes with "wreck") I bought 2 years ago, and they told me that they no longer stock that part because it's "obsolete" (!)