That's an interesting point. To give a sense of scale, at least in the context of the US market:

"According to US News and Freddie Mac, homebuyers should actually budget up to 4% of the property’s value in annual maintenance costs." [0]

"house price rises have averaged more than 5 percent over the last few years." [1]

[0] https://www.upnest.com/1/post/what-is-the-annual-cost-of-mai...

[1] https://www.cnbc.com/2018/06/06/us-house-prices-are-going-to...