A group of local UMC churches did that in my neck of the woods. The old buildings located in rural, small villages were costing a fortune to maintain. Each one may have had 20 or so congregants, one of them had a dozen. The goal was to sell them all and build one large modern church.
One church bucked and has stayed open with a 1/4 pastor. They have a Thrift Shop and a Pre School Program that keeps them a float. They might only have 20 congregants or less in a large brick church.
Out the remaining churches only one church has sold, one is being used and I don't know the status of the other two. I think they were vacated and on the market.
Dan
