I'm sorry to hear about your injury.
I don't really agree with some of your basic principles here, I'm afraid. "I looked at buying a cheap used gas car but since I couldn't maintain the car myself due to my injuries I needed something with a warranty." Why does that follow? A car with a warranty is going to be jacked up in price, since you're going to be buying it from a dealer. And you know they're not going to offer a warranty unless they make money off it.
It's much more frugal just to buy a reliable used car (getting it checked out by a mechanic before you buy) and take the risk that nothing extreme is going to happen to it — and that if it needs some repairs, you just pay for the repairs. But why assume it's going to need some repairs? My Toyota, which is 21 years old, has never needed any repairs apart from the regular maintenance.
It seems to me that what you're basically saying is "A used car might need some expensive repairs, so I'm going to spend a lot of money another way, to avoid the risk of expensive repairs." But with a lease, you know you're spending a lot of money — it's not just a risk, it's a certainty. And you're not going to have a car you can sell at the end of the lease period. You said, "After crunching the numbers, a lease on an electric car over 3 years cost about the same as buying a used car with a warranty." But you didn't need to buy a used car with a warranty; that's overpaying. And at the end of the three-year period, if you'd bought a car, you would have had an asset you could have sold. However much you could have sold the car for — that's how much you've lost on the deal, minimum.
So 8% of your income — ouch. Well, as the saying goes, "That's what we call 'tuition.'"