These scriptures seem to settle this issue for me:
1 Timothy 5:17-18 (New International Version)
"The elders who direct the affairs of the church well are worthy of double honor, especially those whose work is preaching and teaching. For the Scripture says, "Do not muzzle the ox while it is treading out the grain," and "The worker deserves his wages."
Galatians 6:6 (New International Version)
Anyone who receives instruction in the word must share all good things with his instructor.
Luke 10:7 (New International Version)
Stay in that house, eating and drinking whatever they give you, for the worker deserves his wages. Do not move around from house to house.
1 Corinthians 9:4-14 (New International Version)
"Don't we have the right to food and drink? Don't we have the right to take a believing wife along with us, as do the other apostles and the Lord's brothers and Cephas? Or is it only I and Barnabas who must work for a living?
Who serves as a soldier at his own expense? Who plants a vineyard and does not eat of its grapes? Who tends a flock and does not drink of the milk? Do I say this merely from a human point of view? Doesn't the Law say the same thing? 9For it is written in the Law of Moses: "Do not muzzle an ox while it is treading out the grain."Is it about oxen that God is concerned? Surely he says this for us, doesn't he? Yes, this was written for us, because when the plowman plows and the thresher threshes, they ought to do so in the hope of sharing in the harvest. If we have sown spiritual seed among you, is it too much if we reap a material harvest from you? If others have this right of support from you, shouldn't we have it all the more?
But we did not use this right. On the contrary, we put up with anything rather than hinder the gospel of Christ. Don't you know that those who work in the temple get their food from the temple, and those who serve at the altar share in what is offered on the altar? In the same way, the Lord has commanded that those who preach the gospel should receive their living from the gospel."