I'd revisit the church scenario before giving it up. Find a time the church building is open anyway but nobody's using the piano, that way you're not making any big demands on them. Like Wednesday night prayer meetings or whatever. Pop in one night when everyone's arriving and ask the preach if you could use the piano that time every week? If you're actually on shaky terms with your church, try another one. They might be thrilled and ask you to substitute when their regular player is on vacation or whatnot.