Last year my Junior Software Developer (with ETH Masters) balance sheet looked as follows :
Income:8650
Taxes :1640 (income, social etc. ) Food/Drink/Dates: 1560 HealthInsurrance : 346 Rent : 1640 (2 rooms 64sqm) downtown nice part of town Other : 400
So i end up saving 3k per month
But i don't have kids that would be >2.5k per kind for daycare.