Help with mounting legal fees

As many of you know, I lost my daughter in 2011. She was a Marine, a veteran of Iraq, and suffered with PTSD issues. She was 28. I moved in with her husband and my grandson to help with care and expenses. My son in law was killed in a motorcycle crash 20 months after my daughters death leaving my grandson orphaned. Now paternal relatives he barely knows are trying to take him away, creating more trauma in his life. This little boy needs as much stability in his life as I can provide. He is in grief counseling on an individual basis as well as group therapy with other children in similar circumstances. The legal fees are mounting at an alarming rate and I need help. We've already burned through the majority of our savings fighting to keep him where he wants and needs to be...with us, as he has been, and as his parents wished him to be.Thanks for any help available...