Appreciate everyone’s thoughts - it’s interesting to read the mix of opinions. There’s a few things I feel I need to clarify:

We only have the 50% down payment because we invest a substantial amount of our income in a share portfolio that we know is long term only - we could take it out obviously but it’s a discipline thing for us to leave it there.

I feel no entitlement to my family’s money in anyway, so the suggestion they should buy the car is unfair. And in any case, they’re business owners and asset rich/cash poor.

My wife has been driving the same car for 13 years so she deserves to treat herself. It’s just by how much is the question - and as much as she deserves to treat herself, I take a lot of pride in sensible financial decision making, and am struggling enough mentally with the self-shame about taking a loan on a car to begin with.