DH and I have been foster parents for more than 12 years now. We are currently finalizing our third adoption. DD came into our care as a newborn just a few days old. The intent was to see her go to a foster resource home, a family fostering with the intent to adopt. Nothing happened and the longer she stayed with us the more obvious it was she was going to stay
I think Foster parenting is a wonderful way to explore adoption. I'm in Ontario Canada... not sure about how things work in the US but our expeience has been positive so far.
There have been no expenses involved in adopting through our local CAS (Children's Aid Society)
Good Luck to all who are in the process of adoption and those exploring the possibiliy. What a wonderful gift for everyone involved!