But unless you have a household income comfortably in excess of 100k you’re probably also going to be struggling to save a house deposit at any pace. In my example above, remove the 2300 mortgage (on a house valued at 525k in a not very nice area of zone 4) and replace it with 1800 in rent for a simple 2 bed flat in zone 4. You now have 1350 / month for all groceries, petrol, car costs (MOT, road tax), clothes, toiletries, entertainment and holidays etc.
that is way more disposable income than the vast majority of people have but if you live frugally you might save 600/month or 7200 / year. It would still take you about 15 years to save up a 10% deposit and stamp duty for what is today a 500k house. Yes your income would rise in that time but so would house prices.
I can tell you what a 500k house in London looks like, I own one. It has a spacious garden and it’s semi detached but it has a 1980s kitchen, a 1990s bathroom, damp in the bay window. It is not luxury. It needs rewired, replastered, insulating, redecorated throughout (not in a “I fancy a change way, I mean in a “that silver floral and black wallpaper looks like a cheap Thai restaurant” way). 6 houses on my street are HMOs, there are home office raids from time to time. It’s not what you think someone on a 6 figure salary lives in, trust me.
If you live in many parts of the country with one child in f/t nursery 100k is not going to give you anything like a flash lifestyle. Stable and secure but I repeat you need two parents both earning high salaries (not nec 100k each but together a lot more than 100k) to be doing well and to not have to micromanage a budget in London.
no one is saying others don’t have it much tougher (well I’m not), but 100k is 5713 after tax (assuming you’ve paid off your student loan and make no pension contributions at all). Unless you’re living in a low COL city and have no kids, you absolutely still need to cut your cloth with rent (or interest rates), utilities, and groceries the way they are today.