We couldn't I don't think, certainly not in our current house and with our current lifestyle. But that's irrelevant to you really. There's people who live off much less and are fine and most thinhs are manageable in extremis.
We don't live extravagantly at all imo (no foreign holidays/no eating out/no drinking really/no cinema/no new cars/rarely new clothes/barely any beauty or hair/no gym membership/no sky etc) but we get through a lot of money! For us it's children's activities like swimming, dance, forest school, music lessons, brownies etc that really add up. Plus school shoes and decent outdoor wear as we live rurally. I buy almost everything secondhand but it still adds up.
Our council tax is huge and our water rates are known to be high nationally speaking. We get through a lot of fuel visiting ill parents and for work. Our childcare costs are ridiculous at times (like the summer holidays) and we've recently had big food bills due to visitors from overseas etc.
We have to pay for oil as a lump sum a few times a year, and our dog recently required a lot of dental work that wasn't covered by insurance. Our boiler broke and had to be fully replaced etc etc.
Everyone's situation is so varied, it's an impossible question really.