That's exactly what I'm talking about. A setup like this has some merit, but breakers don't like a lot of switching on and off. I can guarantee that this type of setup ISN'T mentioned in the BC electrical code, and therefore no inspector is going to approve it.
That may tempt some to just go ahead and do it anyway, however stop for a minute and add up all you spend on fire insurance on your house over the past few years, add that to the cost of rebuilding it, and see how much it will cost you IF you have a fire, for whatever reason and the insurance company sends the local inspector out to check things out and sees this setup. Insurance companies can automatically cancel your policy retroactively if, for any reason, you have altered the electrical configuration in your house (read the fine print) and it is NOT inspected and that record resides in the files in your local municipal jurisdiction.
Always remember, insurance companies are the biggest form of fraud ever thought of, and they are NOT in the business of providing a service to you, they are only in the business of making a profit.
Stan