Make the most of your group holiday and common budget which may allow you to use services you couldn't afford the rest of the year.
A home helper could take care of the cleaning and tidying (bathrooms, kitchen, living room, etc) during your stay and when you leave. That way, you'll be sure of getting your deposit back. A babysitter or an aupair could take care of the kids and a cook could prepare your meals.
Extra tip: why not hire a personal coach to help you keep in shape during your summer break?