It seems likely that both cars will need changing soon. We're a family of six (and a dog) but we rarely use more than 5 seats at any given time. In the past six months we've used them 3-4 times! DH keeps saying that we need them for the odd 100mi trip or whenever we visit his family. But realistically it happens so every now and then, that even driving two cars would still make more sense in the long run. We're also starting to consider leasing but that's a completely different conversation!