L.S.
I am an adult adoptee and the mother of two adopted children. My son we adopted through the state in a foster to adopt situation and my daughter was adopted from China. I understand not wanting a possible disruption of adoption but frankly with any adoption, other than international, it is possible.
You can find a lot of resources on line. I found most domestic adoptions to be very centered around $$ which repulsed me on a lot of levels, which is one reason we went to international adoption. Unfortunately, many adoptions will run over $15,000. The good news is that there is a $10,000 federal tax credit that you may be able to use to off set costs. That still means that you have to come up with costs up front and then wait for the credit, you would need to talk with a tax consultant because we found with our first adoption we couldn't take the full amount and we also had to extend it over multiple years (it's way too complex for me, that's why I have an accountant!!). There are also several Christian grants available for adoption expenses. The Dave Thomas foundation has a lot of great resources: http://www.davethomasfoundationforadoption.org/ There are literally thousands of older children waiting for families.
If you have other questions for me let me know : )
I hope you are blessed no matter what your end choice!!