Hi

My parents adopted my sister (when she was over 18) and did not need a lawyer. They were able to get the papers themselves and file them with the family court.

It might be different because your son is still a minor, but i assume that all parties are in agreement, and if the (sperm) father is unknown then he would have no claim to make and it may be possible for you to claim for adoption yourselves. Lots of the costs associated would be the lawyer fees and if you can cut them out it might be more achievable.

Good luck,

Kate