Happy Chinese family looking for helper

We are a family of a young senior, 3 young adults and 2 school children.  We are a very easy and happy family.  My current helper (60 years old) worked for my family for 25 years.  She  is leaving because of poor health (back and leg pain).  You can tell that I am a good employer whose helper can work for 25 years.   

Job includes housework, cooking, washing, ironing, car washing, helping me with my marketing and helping to look after my 2 school going grandchildren, 12 and 8 years old.