DP and I have three children between us, and are expecting our fourth in a couple of months. I have a small, but nice car that is on a cheap finance deal, I will own it outright in a year. DP originally took out a cheap finance deal for a similar small, nice car. This isn't the ideal scenario; it means whenever DP has his children we will need to use two cars for days out, trips away etc. The boot of my car isn't massive, so it also means the buggy will take over the whole thing, leaving no room for anything else. I wasn't bothered by any of this though, because we had decided we would both have cheap cars and make these sacrifices to save money.
Today, DP has said he no longer wants the cheap, small car he'd agreed to finance, and has doubled the finance budget. He wants to get a sporty, posher model car. We can afford this, that's not the issue, but we will no longer be saving money. My argument is, if we are now doubling the finance budget, we should get a bigger car that can accommodate all of us. He's adamant that he wants to get a sporty, posh car even though it's impractical.
AIBU?