Termination of Parental Rights of the NCP

My husband and I are interested in terminating the rights of our two kids (my step and his step).
Before anyone jumps at PAS – please hear me out. Because this is a decision that will impact our children’s lives I am asking for opinions and I will take them all into consideration. No, I am not one to make decisions based solely on the advice of people I have never met I do appreciate the insight as to what people in like situations would do.
Here is our reasons for wanting this termination as well as our basis for such.

Background first – my BD14, BS 11, and BD 7 live with us. My SS12 from Dh’s 1st marriage lives with us. Two step-daughters that live out of state and we have reasonable visitation with (7 & 3) My DH adopted my BS11 – he has never seen his BF. He wishes to adopt BS14 and BD7’s BF is in her life. I wish to adopt SS12 .
First, my BD is 14 – her father pays child support monthly and has never missed a payment. He had nothing to do with her the first nine years of her life and then sued me for custody once child support was ordered. I have full custody and he has “visitation rights only”. This was five years ago. He picked her up for maybe three visits and hasn’t picked her up since. She maintains a very close relationship with his grandmother. She speaks to his mother on occasion when she is at the great grandmothers. They never call her and he hasn’t even laid eyes on her in over three years. He will however send her a giftcard on her birthday and Christmas (this comes from his mother – and she pays the child support in an account bearing both of their names). My husband wishes to adopt her because they have that typr of relationship. She has recently been going through her early teenage issues and is seeking male approval. She strongly desires to have our last name and make the man she sees as the only father she has ever had in her life her legal father. We strongly desire that should something happen to me to where I became disabled or deceased that he would retain custody and could keep the majority of our children together.

This is the very same reason I wish to adopt my SS as his DH has had custody of him since he was 4 months old. This is joint custody due to the state in which they lived. BM and DH have resided in the same state since SS was about two. He says she has sold drugs around him. She hasn’t work since I have been married to him, doesn’t have a vehicle, doesn’t maintain contact with him. She hasn’t seen or spoken to him in almost a year. Abandonment in our state is 6 months. She has never assisted in the support of this child and support wasn’t order when he was with her 50/50 – which has never been the case. She has always came in and out of his life. She has called twice and my SS has told her until she gets clean (bi-polar and alcoholic) that he will not go back to see her and doesn’t wish to talk to her since she won’t clean up her act. He is scared to be around her and the BF – (met in AA – he had DUI)
That being said she is not able or willing to support him or even attempt to restore that mother/son relationship.

SO, both cases fit the tests to terminate right, voluntarily or not……..feedbacK?