Rental car or taxi?

Thanks for the advice. No I am not walking from the airport! But I might email about the van.
Europcar (which I've read is the most reliable?) Price with insurance is a bit more than a taxi, so that's silly.

But how about driving to DF via someplace like taxco after. Rental cost split a few ways matches airfare for a few people (~$300us), and it's a chance to see someplace interesting which is hard to get to buy public transport.

Then again, maybe your guy with a van would take us there for the same price, then we could go on by bus the next day. How's the security of that?