In desperate need of car advice for twins and a two year old!!

Hi everyone I really need some help! I have a two year old at the moment and am expecting twins. I need to buy a new car to fit them all in and really want it to be one where all the car seats use isofix bases rather than seatbelts. I also want the car to last so it needs to be one where they will still fit when they’re in the bigger car seats. Any recommendations please?! I’ve found cars with 3 isofix points across the back but been told 3 actual car seats are very unlikely to fit all at the same time. I’ve also found some with an isofix on the front seat and could have two in the back but then there’s no room for a passenger! Other option is a 7 seater and one on the back seat but then there’s limited room for a buggy?! Help 😥 thank you!! 😊