Our church (Episcopalian) does 'time, talent, tithe'. The church would love a 10% tithe but realizes that usually isn't going to be possible. I believe the modern amount for tithing is 5% now. I give a huge amount of time, and talent, to my church. I am not close to the 10%, more like 3%.
But to those of you who feel that God will provide, I guess he probably does up to a point. But churches have bills to pay just as we do..heat, electricity, staffing, etc. If you want the services, then you must pay for them.