3 in 1 car seat

Je

So I currently travel in 2 different cars and it’s beginning to become a pain in my ass to have to constantly switch my car seat base around. And im going to want a 3 in 1 anyways so i was just wondering whats a good one thats fairly cheap? I dont want to spend more than $250 CAD and my little guy is 6 weeks old and ive read reviews on some that say they hold 5lbs and up but they didnt fit a baby until around 9 months anyhow so any ones that would fit a newborn without an issue?