This is a bit vague and waffly so apologies in advance.
I have a 5 yo DS and an 18 mo DD. At the moment I'm a SAHM and it's fine in the sense that I'm coping and there are just enough nuggets of pure joy to get me through the drudgery and behaviour issues.
DS is adorable, but very high energy and an extreme extrovert who demands a lot of attention and gets very stroppy and rather destructive if he doesn't get enough. He likes loads of company but needs keeping an eye on with friends as it can get a bit wild. He is best described as challenging but rewarding. DD is also adorable but entering the tantruming stage where she has to do everything herself but isn't quite capable of it so dressing, putting on shoes, going anywhere (won't use the pushchair now she can walk) all takes time, during which DS gets bored. However she can play by herself which DS simply can't.
We may possibly be adopting another child as DD has a sibling who is a few months old. If we do then I would want help. I know that there are plenty of mums who cope with much larger families and love it too but I'm not a natural and get frazzled easily.
I would like someone who is able to have sole charge of one or two of the children some of the time but would also do some housework and cooking (including for DH and I) which I'm not sure a nanny would be keen on. Ideally I would want to do most of the childcare myself and delegate the dreary stuff like menu planning and shopping so I guess it's mostly housekeeper stuff but with a childcare crossover so that I can get my hair done or go to events at DS's school, but also someone who would be happy to take DS to the park and play football or something to burn off energy.