I priced up Les Arcs early season before booking Borovets and the best I could do was about £900 each with flights, transfers and Half board with lift pass costs thrown in (£260 for 6 days each). Plus then day care for Alex was another £700+
So for the 3 of us it was going to be £2.5k+ for the week.
Sure you can do it cheaper if you go with mates and can do a tripple or quad rooms, but as a family, it was the best I could do.