Comfortable Expat Family of 4

We are looking for a calm, competent yet simple DH who could assist Madame in running a household of 4 in a large size home, 2800sqft duplex. 

Duties include house chores, marketing, food preparation/cooking, easy child care (12 and 10 yr olds are largely independent), lots of ironing work and weekly car washing. Must follow instructions and willing to learn new skills.