Typos+weird words=typing on my iPhone
Does your midwife know you were planning on using her for childcare? I think most midwives would not be willing to take care of other kids while attending a birth - their focus is on the labouring woman.
I did not have a UC, but I did have to arrange childcare for my last delivery because we had just moved far away and knew no one. I interviewed a whole bunch of neighbourhood people willing to babysit for a few hours, and made a detailed schedule with names and availability. I was expecting a quick delivery (I wasn't - over 30 hours of active labour) so I wanted to find someone quickly. We ended up using 2 different neighbours, for about 10 hours each. Worked out well.