Discuss with the significant other but I would lean towards "go for it".

Enjoy the car for 5 years, then sell it and buy a nice family car with the remainder. You're only spending HALF the money if you think of it that way, in exchange for living your dream while you're still young.

If you start making a lot more money when you're 40, I'm afraid you can't use it to turn back time

PS: You're not poor. You just can't afford to go through lambos like cupcakes!