Sounds like a great step in the right direction.

My plan would hopefully be simpler, to convert a gen2 Prius to full electric. And eventually a VW T5 and a Citroen CX to Prius power

I have also been thinking of doing an EV conversion on a T5, I currently drive a basic version. I thought a Prius drive unit using both MG1 n2 would provide plenty of power (mor power than my van has anyway) and as the OP stated there is plenty of room underneath for whatever battery you would want ...

I currently drive a VWT5 and have also thought of converting one (mine has only 150,000km on it so probably another) to electric. I though of using a Prius drive unit, using both MG1 n 2 you get quite a bit more power than the base model t5's. A set of custom driveshafts (Toyota inner and vw outer ...