Cuda acting up. Turn key and nothing?

Your statments remind me of a similar case. My sister once had a disease called Giliam Beret' ( spelt ). It left her weak as puppy pee. Intermittently she couldn't start her car. Problem was in her ability to turn the ignition switch. It was a older Chevy and I did adjust its ignition switch a little which helped.
Other similar cases are related to the neutral safety switch / shifter adustment .
One of the downfalls of the rally dash is no reference for switch on. Unless you watch for the fuel gauge to move or the radio is on you really dont know if the car is on or not.
Doubt any of this helps.