That's kind of what I was trying to say. And it might actually LAST 240k miles over 3 years. I forgot to ask the OP, who is actually paying for all of this driving or the vehicle ??
Absolutely. I’m on my 3rd prius. Got 300k plus and just about zero mains costs other than tires, oil, brake pads (pads after 107k miles).
I would say go for it. The biggest outlay, if it goes wrong (unlikely), would be a new traction (HV) battery at around $4k (which is covered by the warranty for the first 100k miles I believe in the US ?). If your current vehicle does 17 mpg and the Prius 50 mpg, going on current gas prices of $3 a gallon, you'll be saving over $9k a year on fuel doing 80k miles. So over 3 years you've saved $27k, even factoring in a new HV battery during that time, you've still saved $23k.