What about region Wädenswil / Richterswil?

Zürich's about 30 mins away by motorway or train.
Flat prices are around the price you mentioned.
Nice location on the Zürisee
There are plenty English / German play schools / creches around
For kids Brunni (with special kids ski school) is 25 mins away
There's even a snow creche at Einsiedeln about 30 mins away
Adults - Flumserberg & Hoch-Y-Brig are not so extensive - but ok and they are about 30-35 mins away.
Let me know if you want more info..
Roobarb