There are several same sex couples that are 'regulars' on there that might be able to help you in that aspect. Also people there might be able to direct you towards some lower priced agencies. They do exist! Also, adoption from foster care might be an option for you to look into though it varies by state the availiblity of infants that go into care.
Let me know if you need help navigating on that site. And let me know if you do post over there and I can see if I can direct some 'regulars' to you to help.