We definitely have a different idea of collectors
Most of the collecting stuff I've done is in the old tool world and, at least there, the originality of the parts is more important than the condition. In our case we're not thinking of selling any of our machines except possibly the Whites (freeing space) and even they aren't sure things.
In this case turning one of the other machines into a low shank is strictly for usability. As for the motor, again usability at minimal cost in terms of my time. Going hand crank would also give us one of each on the Red Eye front - treadle, electric and hand crank - which sounds nice. It would be better if Herself were willing to make Claudette the hand crank as it's the prettiest of the bunch and the hand cranks are largely on display at the moment - they're much better for display than electric machines and they take up so much less space than treadles that they win out there as well - but I doubt she'd go for that