I applaud the dream, of course. As someone mentioned, pretty much all older vehicles were infinitely more repairable than current designs, so, no USSR tech required. For the first ten or twelve years of my driving history I bought used cars with at least 80K miles (128 K km) in the odometer. This means I spent my weekends and some evenings under the hood or under the car. This is to say, I get it.
The problem with electrics is that they are very far from "grease monkey" territory. When one starts dealing with high voltages and high current discharge capability, one very quickly leaves the domain of what the average person can and should be able to touch. In fact, lots of EE's lack the experience to safely deal with such devices.
The good news is that they are much simpler (in the sense of the modules that make-up a vehicle) than the internal combustion version. First order repairs should take the form of changing modules. The factory can then deal with component level repair (think: motor controller).