Thanks people. I am going to push ahead with and really appreciate your responses. His condition comes down to frequencies, so I can change screens etc, tyre, etc. We have a house battery that carries no fire risk. I an reduce the voltage as im not going on an autoban anytime soon. I believe the tech is going to develop over the next 2-years. Wife is getting an electric Mini for the obvious health issues.
Above all else I think it is going to be awesomely cool to do!
Thoughts and opinions are invited, the Westfield stuff is really interesting.
Matt