Tony,
THE single most important thing, if I understand you correctly, is your relationship with this family. This being the case, I would say you have a really big problem on your hands.
If I were in your position, I would say nothing further and follow your own heart. You two have a huge difference of opinion bordering on the "religious".
Regarding "free" - for sure, it will cost you little or nothing, but that is only one aspect of "free". Then there is the "free" as in "freedom" which you most certainly will not have, and then it will cost you your liberty, which perhaps answers your question.
best, Steve
-- Anthony Baldwin
http://www.School-Library.net Freedom to Learn!