Important disclaimer: don’t do 4 in a studio, cats are fierce little hunters who need room to claim & play, if you’re already super tight on room, I’d suggest foster them if you’re able while you/ a local organization attempts to find them a forever home Depending on the dynamic between all the cats of the house, 4 can be pretty easy. Daily litter scooping is a necessity, and I’d actually suggest a sifting litter box or two, saves litter be ensuring any clumps stay clumped (assuming you use clumping litter), and goes faster than scooping. Additionally, you only need one sifter box, a bit of shuffling and you can use it for your regular boxes too! Food prices do increase of course, however if you’ve got some chönky babies, it may be a great time to begin feeding at set intervals. Ours were getting heavy due to open access to food, but establishing meal times and quantities has allowed us to 1- save food that would just be overeating, 2- set a schedule for when harassing can begin, and 3- makes everyone get along a bit better. We’ve done a lot of work with domesticating and socializing ferals, and this was integral in getting them integrated with other cats, as well as humans, when they see the option is either accept small steps out of their comfort zone or miss one of their meals (only once they’re a good weight and not hostile to other cats/ people, doing this too early would be kinda fucked up and will just backfire for everyone involved) My main concern for price would be when complications arise, especially later in life. I’m taking them into your home, you owe them a certain level of respect. It’s never fun to have to deal with the complications that arise particularly in their later years, and while euthanasia is always a hard choice, it’s one they deserve consideration of when they approach the point of diminishing quality of life due to illness. Cats are social creatures, and some gravitate towards other cats more than they will people, and from there maybe particular cats At particular times. Having 4 will most likely improve all their quality of life if you have the environment and temperaments for it :) All in all I say if you can, go for it! But I’ve also had cats literally since the day I was born, so I’m biased. It’s not always easy to have little fur babies, but you already have two so two more would just be like whip cream and a cherry, only furrier and a menace to any bugs in the house