I would like to open a home for pregnant teens. Is there any funding for that?

You could apply for a federal grant but the easiest way I know to do it would be to get licensed by the state as a foster home. This is what I do in my state and have had several pregnant girls over the course of 22 years. It is very rewarding and, if you have a large enough home and a lot of help, you can provide a very beneficial service, especially to girls who are in the system and have no other resources.