In regard to the 5 days a week - I've been a SAHM a good portion of my kids childhood. I would never use care 5 days a week for several reasons. The cost would be huge, I would miss my kids too much. I feel MY role is to care for them. But I really have to agree with others here - I don't see the difference between the mum working for adult interaction 5 days a week, and a SAHM using DC 5 days a week. Now if the DH is working a low wage job and they need the 2nd income just to pay the rent. That really is a need to work.
and I will add there is no judgement from me towards the mum that is working to fund an overseas holiday every year or just to get adult interaction. None at all.