The OT tithe was a tax, a command, and an obligation on those who profited from agricultural goods. It was never, ever money, only things the God had created, plants and animals. Word of Faith people, like Copeland, tell people that was because everyone was a farmer. What...? Just how stupid do you think we are? Metal workers, tent makers, textile makers, masons, innkeepers, lawyers, Carpenters, etc. None of them were commanded to pay tithes. Count me among the stupid for over twenty years.
But alms were different. They were at liberty to follow their heart in what and how much they gave, just as Paul teaches in the NT.
Jesus told the Pharisees that they were right to give a tithe of their herbs but they weren't taking care of the poor, the widows and orphans. Alms. The widow gave all that she had to care for others.
Paul said we should provide for those who work to advance the Gospel....feed the ox when he is trending.
If we want to have a building to meet in then we need to pay the expenses and maintenance that come with it, as a shared obligation.