You can easily check your minimal health care rates in internet, for example here - health-quotes.isgreat.org
Well anything over zero or newborn, you are probably going to have to go through the foster care system.
If you adopt a newborn, the fees start at a minimum of 25,000 and go upwards depending on whether or not you go domestic or international.
If you adopt from the foster care system, your adoption can range anywhere from free to up to 1,000 dollars. I have never heard of an adopton being more than that but I suppose it could happen but it will never approach anywhere near what it cost to adopt a newborn even if the child is only a few months old.
If the adoption is an agreement between two friends, or family members or any adoption that does not go through an agency, then the cost, regardless of age, is whatever the attorney charges and any related court cost.