<prompt> Human: Throwaway due to financial info.My SO is looking for a bigger car as we now have a second child and feel quite cramped in our current car.We are looking at a slightly used PilotHighlander at - 35k everything is in CAD so prices are a bit higher. She wants to buy the car herself because she doesnt not own any car we use my 9 years old Pontiac Vibe, which I would keep as a second car. We keep our cars 10 yrs so were looking slightly used 2015-2016.By not having a car for quite some time and not being a big spender overall, she saved quite a bit of money and is looking to pay it in cash.My SO earn 50k raw and I cant wrap my head at her spending such a big chunk of her income on a car. I earn roughly 100k and Im not sure I would want to spend that much. She can easily afford it initial cost running cost but it seems irresponsible to me.We looked at cheaper alternatives, but the additional mileageyears on cheaper cars is not great 2 years older is about 5k cheaper which is not that big of a discount for a car that will last 2 less years. I talked to her about the 20410 rule but she kind of dismissed it as unrealistic because when she did the math she couldnt afford anything but extremely oldsmall.Am I out of line thinking this is unreasonable? I thought about buying a part of the new car but it means I would have the financial responsibility of 1.5 car, which seems kind of unfair to me. I could sell my car, buy half of the new car, use it for work i need a car for work, she doesnt and we could subscribe to a car sharing service they are well developed in our area for the relatively rare times we need a car concurrently.PF, whats your opinion?Some infos-Me : 33yrs old, 100kyear, 400k in savings-Her : 32 yrs old 50kyear, 150k in savings. She always maxes her RRSP Canadian 401k-2 young kids.-House is paid but cost us around 12kyear in energytaxes.-Current car is ok. Just pretty small for 2 kids. I could always trade it in for 4k.-We share common expenses as a ratio of our income.  <response>: Why are you talking about your incomes separately? As a family the income is one pool. You make 150k. You have 550k in savings. You max your retirement plans, your house is paid for, and you will pay cash for the vehicle.Buy the car. Buy a brand new one if she wants. 