Thanks so much for the replies everyone.

I did not consider adding something to the key or making something so she'll have more leverage.... That could be the ticket. That would save having to mess with the steering column or any wiring.

My mother is disabled is unfortunately no longer able to turn the key in the ignition to crank her '96 850. She can turn the key to accessory position but she cannot apply enough force to turn the key to crank the car. Is there any way to install some sort of push button or switch to start the car w...