I have to chime in here, first of all because I'm from Bel Air, MD and I notice that's where chaddukes is located.
And also because we've had *so* many bass teachers and school music programs recommend EUBs for their students through the years. Especially for growing kids, sometimes EUBs are less cumbersome to carry, etc ... as long as the chosen EUB has the proper reference points and scale length so an easy transition can be made to the acoustic upright. That's been our experience anyway.
As far as luthiers who specialize in acoustic instruments are concerned, some of them may not want to mess with the on-board electronics with which many EUBs are equipped. But there shouldn't be any issues with fingerboard planing or any other basic woodworking issues. It really depends on the luthier, some are more open-minded than others. Guitar tech-types can usually handle any wiring repairs or pot replacements, that sort of thing. But it's often best to have the person who built the EUB do any work to it, if that's a cost-effective option.
- Steve