For three of us, in a room for three (double plus little single room off), passes, childcare (only childcare needed, no equipment/lessons for dd), equipment for mrs dd and me, flights, transfers: around £3k.
Ouch!
For comparison here is the cost breakdown for our Neilson holiday in Les Deux Alpes mentioned above:
Accommodation, passes and flights: £2359
That includes 7 nights (15th March) with three adults + 1 child + 1 baby in a “Family Room” (two large connected rooms with shared bathroom and balcony overlooking the slope). Plus flights from Manchester, transfer to/from Grenoble, 2 x ski/board carriage, 1 x adult lift pass (adult passes were on 2-for-1, child was free).
On top of that child ski rental was £50 for boots, skis and helmet. Then 6 x 2.5 hours of child ski school was £150, plus 6 x days wrap-around at kid’s club was about £180 from memory.
So I make that about £2739 (+ lunches and drinks).
(Note: booking direct online saved us £416, and SCUK discount saved us another £227).