I wonder if anyone else does this, because I have never seen it advocated.
If I need a cultural expansion, but it's not on the very outside of my empire (i.e. not next to an opponent's city) then I just build the cheapest culture and then after the border expands to the Big Fat Cross, I just sell the improvement. I do this so I get the BFC, and I don't have to pay the maintenance!
If I need a cultural expansion, but it's not on the very outside of my empire (i.e. not next to an opponent's city) then I just build the cheapest culture and then after the border expands to the Big Fat Cross, I just sell the improvement. I do this so I get the BFC, and I don't have to pay the maintenance!