I am only familiar with schools in Adams 50 school district, and our local community elementary school was very good for her. It was all about the individual teachers, IMO. She's having a bit of a rough time adjusting to middle school (she's 12 and in 6th grade now, but is more like an 8-year-old, socially and emotionally).
I'm not sure how to answer the question about cost of living. Depending on where you live, a '60s rambler, 1800 square feet and 3-4bed, 2bath, will cost you anywhere from 150K-200K (on average). Obviously it's greatly dependent upon where you live. I live on the west side. Living somewhere like LoDo or Highlands, it's going to be a lot more.
For me, the interview was done completely by the unit. Our unit is very small, so it's a group interview with all staff members, and we all decide, rather than just the manager. Other units, I'm sure do it differently. I do feel like the hospital supports its nurses, with regards to continuing education.
As far as local churches, I know of two on the west side that are pretty big. A lot of our friends go to Flatirons Church. Our neighbors/good friends are the leaders of the Vineyard Church, which has branches in Arvada and Denver. We go there once in a while simply because we love Jay, the head pastor, and it's a very welcoming, inviting atmosphere for us (I'm agnostic and my husband is atheist, but they still welcome us).
Hope this helps!