Looking for Domestic helper

Very simple family with my nephew 11yrs old, grandmother 88 yrs old. Only 3 ppl in the hse. We live in Yuen Long. In the morning, get my nephew ready to school and cook breakfast for grandma, then go market, cook lunch, hse cleaning, rest until 16:00, prepare dinner and cook. We all sleep by 21:00. We are allergic to dust. Have to be very clean and self motivated. No playing phone during working hours is a must. Salary $4410+bonus+education allowance for your kids