Vicki,
Since this is an identified adoption, I wouldn't expect your total fees and expenses to exceed $10K really.
You'll need to complete a homestudy and post-placement supervsion. In some states this can be done by a SW, in others an agency must participate.
Not up on Pennsylvania's adoption laws, this link may help:
http://members.aol.com/StatutesPA/23.html
You might also want to get in touch with a quad-A attorney who's got experience in domestic parental placement in PA. They will definitely be able to advise you on consent and revocation periods for biological parents as well as estimated total fees. Call at least 3 for fees as I've found they vary widely.
HTH best of luck.
Regina
__________________
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"It will all be OK in the end. If it's not OK, it's not the end." - My friend Amy
"As God is my witness," Mr. Carlson insists, "I thought turkeys could fly"
Philly Area AParents Meetup!
http://adoption.meetup.com/117/