A friend of mine (who lives in a house of a much smaller scale) spends £2000 a year on gravel alone for his drive. Then he either needs to spend weeks spreading or pay someone to to do the same. Once you have a lot of something, things sure get expensive.
On a similar note - say he wanted to replace his doors Now he won't just want to use form £100 from the hardware shop, so realistically will be looking at £600+ for nice handmade bespoke internal doors. And then a future £100 for the door furniture, maybe £100 to get each painted and prepared and maybe £100 for the fitting. Before you know it looking at £1000ish a door. He had over 25 doors, and this was 'only' a 6 bed house... yes you aren't replacing these every year, but just an example of one of the costs.
On a similar note - say he wanted to replace his doors Now he won't just want to use form £100 from the hardware shop, so realistically will be looking at £600+ for nice handmade bespoke internal doors. And then a future £100 for the door furniture, maybe £100 to get each painted and prepared and maybe £100 for the fitting. Before you know it looking at £1000ish a door. He had over 25 doors, and this was 'only' a 6 bed house... yes you aren't replacing these every year, but just an example of one of the costs.