We could probably afford to replace her Impreza with a 2012 Leaf, but it doesn't have the range or cargo space she wants.
Due to health problems her income has been down dramatically this year. She does have good health insurance that covers most of her costs, but she's still waiting for some bills the insurance won't cover. Fortunately her long term prognosis is excellent, but money is tight.
I'm probably one of the poorest Model S owners on this forum. I drove a 1992 Buick for 24 years and replaced it with my S. It was a major budget stretch and I probably wouldn't have done it if I knew my SO was going to have the health problems. Financially we're doing OK on just my income and I absolutely love my car, but right now major expenses are only called for if it's absolutely necessary.
Best of luck! Hope it all passes and your SO gets better! More important than a car.