OP how much do you think a nanny, a cleaner, someone to wash & iron, a cook, someone to do all the life admin, gardening, shopping, taxi service per week would cost for 24x7?
A Nanny working a 12 hour day, 5 day a week job (live-in, UK) would be on a minimum of £400 net per week, probably closer to £450/500. The Nanny would look after the children and children's rooms only.
A cleaner wouldn't do the cooking, so he'd need a housekeeper - possibly part time if alongside the Nanny? A FT housekeeper makes about £450 net a week, so half time would be about £225 a week.
A gardener would charge about £50 a week to come in once a week for a few hours to maintain things.
The Nanny or Housekeeper may take on some of the admin duties, if not a part time PA would be needed.
This wouldn't include wraparound childcare for the nights or trips away ("Proxy Parenting") which would basically be the cost of another Nanny each week.
The Nanny and the Housekeeper would both be Live In at the above salaries, so this isn't taking into consideration the cost of housing and feeding them of course....
Let's go on what the government deems enough to pay for basics per week with the job seekers allowance of £80 pp [obviously way too low as doesn't take into consideration accommodation costs]
so that's an extra £160.
So:
Nanny: £450
Housekeeper: £225
Gardener: £50
Proxy Parent/wrap around Nanny: £450
Live in costs for Nanny/Housekeeper/proxy: £240
£1,415
So @TheReef isn't far off.
To replace everything you do in the house would cost him at least £73,580 a year.
[I run a domestic staffing agency, so I'm not pulling these figures out of thin air!]