adoption of a known child in Texas

I am in Texas. DH and I have been pursuing internantional adoption...recently, a friend contacted us about a young boy that may be available to adopt here in Texas. His mom is out of the picture and relatives know he would be better off with a different family. My questions (lots) are. 1. do we contact an attorney immediately, before moving any further? 2. Do we need a home study? 3. Are the fees associated with domestic adoption a tax credit...like the internantional? 4. Is it possible to do this without an enourmous amount of fees? We have spent thousands already with the internantional agency. Thanks in advance...I would love to hear from other Texas families :)