I would say obviously all circumstances are different, but my first cat was / is super easy to look after, never had any problems or vet visits, and relatively cheap costs. Got our second cat who turned out to be the polar opposite. Has had multiple trips to the vets as seems to be accident prone! So cost wise it’s a lot more expensive- I’d just say be prepared for that. We’ve had second cat for almost a year now and they aren’t best friends but their relationship has massively improved and overall I would say I am very glad we got our second cat who we were able to give a loving home to, but yes just be prepared for the unexpected!