I crunched the numbers on my household (two people) awhile back. Once you amortize weekly things like laundry, vacuuming, shopping and washing the dog they com

I crunched the numbers on my household (two people) awhile back. Once you amortize weekly things like laundry, vacuuming, shopping and washing the dog they come out to less than an hour a day. Cooking and cleaning up after cooking is also less than an hour. The real time sink is weekly tasks that take substantial amounts of time. There are basically two categories of those tasks, cleaning lots of things (e.g. making everything spotless because guests are coming) and property maintenance. These numbers are very household specific since the difference between "needs to be done" and "should be done" are very much based on personal preference. Assuming a western lifestyle and a household size of 2(!!) 4hr/day of housework would probably require a high maintenance property (lots of hedges to trim and grass to cut) and/or lots of cooking from scratch and/or heating with wood (and splitting it yourself) and/or doing a lot of cleaning that is probably not strictly necessary. A castle is stretching it but if it's a small castle, the landscaping isn't too opulent, you aren't a neat freak and have the money to spend on labor saving equipment it should be doable on 4hr/day.