I know there was a maintenance cost for shards and other things, but in .76 I could click on the resource and see that. When I tried to do that recently, FE wouldn't let me because the shard was close to my city, so it treated it like part of my city. Can you click on more remote resource to see the maintenance costs?
If this is still the case where these items cost gildar/turn, this mechanic really needs some visibility or change to being free. When you Build, there's no reference to an on-going cost!