Those are very expensive people to have constantly flying around not doing mechanical work (the transport time is not free, and they're not doing what they do best during that time)
Here's what I would suggest:
Zero needs to make "regional service centers" which could even possibly be existing dealers. These regional service centers need to be located no more than 6 hours' drive away from other dealerships that would be in this arrangement. At each of these locations needs to be a certified Zero engineer that can do all work, including internal battery work. The motorcycle(s) to be worked on can be transported via utility van. 6 hours each way allows for bike induction at the dealership by the end user on one day, transfer overnight, work on the next day, return-transfer overnight, and final verification + delivery on the third day. The transfers can be handled by contractors that specialize in this sort of work.
The other alternative would be for Hollywood Electrics to come to an arrangement with Zero, have them do training and "internship" for lack of a better word there for anyone that wants to do this work at a Zero dealership anywhere, but this would take longer to accumulate the needed talent. Kind of like a dealership "skunkworks" in a sense.
Perhaps both could be done in parallel, there needs to be a means of growing the talent pool more quickly, and a way of reducing the turnaround time for work performed.
Of course, perhaps Zero could make an agreement with a larger ICE motorcycle dealer network such as HD or BMW with more resources at their disposal. I don't know how those are organized so I don't know how practical that would be.