Western family looking for a helper

We are a British/New Zealand family living in a detached house in Sai Kung. We are a husband and wife who both work full time 5 days a week. We have 3 children, 2 of the children are grown and studying overseas. Our youngest child is 12 and attends school 5 days per week.

Main duties include cleaning house, laundry, ironing, dog walking, gardening during the day, followed by childcare after school and preparation of dinner.