Dude, straight up truth, God's gunna provide for you if you follow him. I'm pretty sure he wants you to drum for your church. This really could all be a test meant to strengthen your faith.
Let's look at possible scenarios: let's say you keep drumming with your church and a newcomer sees your drumming and offers you an even better deal at an even better time.
If you trust in God he will always provide. ALWAYS.
Plus...it would just suck watching someone else drum in your place man. Worship would be...well...tedious.
Also, I can't even imagine asking my church for money. It's backwards. Don't we give money into the offering? You're basically stopping with your tides if you ask for money back (I dunno the specifics of your tiding so this is probably really off).
Anyway, pray and read the Bible. Talk to your pastor, be honest. Hopefully, he'll lead you the way God want, not the way he himself wants.