Ds is 1. We have found a lovely nanny for a nanny share who can look after him 3 days a week, and can be flexible about the days (which suits our working lives perfectly). She has been working for a local family for 7 years, and they have 3 school age kids, so the nanny is free during school hours. The nanny share would be based at this other family's house and would include after school time when ds is with the other kids.
Obviously it's a good sign that the namny has been with the family for 7 yrs. But do you think this means ds will always be 2nd best - an afterthought? They have all had this kind of arrangement in the past but it has been with family friends, whereas we are strangers.