Just a thought... You could live well over 20 years after retirement. If you love restoring cars why not just keep doing it for as long as you can? My uncle is 94 and still drives a car almost daily & maintains a large garden in his back yard. He also looks after his ailing wife, my Auntie. She's late 80s and isn't doing so well. Every time I see him I ask him how he is and he always replies with
"Not bad for an old man". 