Have you ever heard of Dave Ramsey great advocate of tithing and getting out of debt!
I have listen to Dave and he is a Christian that teaches many how to live debt free!
http://www.daveramsey.com/
Robert Kiyosaki (Rich Dad, Poor Dad) also reccomends tithing. (basically 1/3 btw)
I love Dave Ramsey. Fun show. Sometimes the truth hurts, but the sacrifice feels a lot better than the bondage of debt.