In fact pushing a vehicle with an electric motor does not require it to hook into the botnet.

Yep, it does not have to, but all the "smart" vehicles that Fjord and Doy-ota sell do.

Did you see the college kids that took over a car and caused it to steer into a ditch, just using the radio? Scary!

I would really like to see garage built cars.

One of my ideas is a 1000 cars in a 1000 garages.
Each garage building a machine that produces a single part, and then swapping with 999 of your closest friends, and viola. Cars.

I am thinking about plans for a tesla turbine powered generator.
If it works, than it would be the simplest build, simplest maintenance.