Well, I'm all for an inboard dual direct-drive set-up, BUT....
"...Preliminary power would be 190 Ft lbs of torque, 130 HP running on 144 volts. Base speed will be around 4500 RPM, so its going to pull to pretty high RPMs.
... Retail price point for the whole system should be around $9000.00"
He better run a few basic calcs before building his planned system (or talking about it) as it would NOT WORK at all. His torque and rpm numbers are WAY off.
As others pointed out, 1500rpm is the max needed (good for over 110mph!!). 4500rpm is just plain ridiculous and shows he hasn't even done the basic math or doesn't understand the mechanical components and forces required to make a car go.
Even the weakest cars ever made have about 100ftlbs x 3.5tranny x 3.5differential = 1200ftlbs MINIMUM. Even if you half that you still need 600 ft lbs.
190ft lbs won't get you out the driveway (if it is uphill).