I don’t think it’s mad, just as PPs have said factors in the cost of a mortgage repayment v rent. For example, when DH and I moved in together in 2014, we were paying £1500 per month for a flat in London when our combined post-tax income was about £4000 a month. We then borrowed the max we could to buy a £300k flat, and our repayments were £1000 a month. We’re now in a £500k house and our monthly repayments are £1500 now, like our rent was back in those days, but we earn more like £6000 a month. So the landlord had no problem renting to us at a £1500 monthly cost, but we’ve had to earn 50% more before a bank would judge us as being able to afford that much. Even though we happily did 7 years ago. Bonkers.