We originally got our foster license hoping we would be able to adopt our nephews, but that didn't happen. The state of Indiana would license us to adopt our nephews, but not other children. They don't let you foster other children if you have 5 or more in your home. We have been licensed for 2-3 years and have only had one placement for one day. That was only because they couldn't find anyone in the middle of the night to take a newborn baby. They took her the next afternoon and moved her. We have never had another placement. So adopting a infant from the foster care system will never happen for our family.
As far as trying to adopt an infant straight from a birth parent domestically is very unlikely. It is very doubtful that they would choose a large family. There are so many families out there who are waiting to adopt a baby locally, that we figured we would leave the US to them.