@Karen1378 There is no "Airbnb insurance" that would cover a guest's car breaking down. Neither of you is in a position to make a successful claim with Airbnb on that issue.
I'm impressed that the guest was proactive enough on the situation to offer to pay a parking fee and arrange a tow truck, but I'm perplexed about how a tow truck called to your property moved the car onto a parking space that you didn't explicitly offer for your guest's usage. I'm not a driver, so maybe there's something I'm totally naive about here, but if you're already footing the bill for a tow truck, wouldn't you have the car towed to a place that you were given permission to park, rather than one whose owner is holding a grudge about it? It seems like something broke down in the communication there.
The guest's auto insurance should cover expenses directly attributable to the breakdown. I'm not aware of a way you can extract a tangible value for the inconvenience of moving your own vehicle onto street parking, as insurers don't tend to recognize vague discomfort as a condition with tangible value. But that's pretty much an issue for you to take up with your own insurance; there's nothing in Airbnb's very limited "Host Guarantee" that can compensate you here. When all is said and done, if you have incurred unexpected expenses as a result of the car situation, you can initiate a claim via https://airbnb.com/resolutions . It's clear that your guest is making a good faith effort to resolve an awkward situation as well as she can, so if I were in your position I think I'd work with her as much as possible to minimize the expenses to everyone involved. Hospitality and inconvenience aren't exactly synonyms, but they're super duper close.