Looks nice!
What does the "work for a client" mean though? Does someone pay for minecraft castles?
It's a pretty complex world. Let's say wally wants to open a MC server that will actually get some people on it. This wouldn't be a regular survival word. It'll be a network offering multiple games (creative, survival, pvp, hunergames (FFA last man standing) and much, much more games you can play within minecraft.
So yes. Wally isn't that creative and doesn't have the time to build maps, spawns or games. So this is where Wally looks for a "build team" these "companies" risen from the online-creative servers supply the server owners with their network hubs, spawns, games and maps.
average prices are 100x100 - 100$ and is send through pay pal.
A pro-ass-amazing dragon will easy hit 1k$. There's also huge custom maps with just outstanding terrain build for stroryline games which also cost crazy.
Most of these servers have +100 people online at average and make money of their donations (you can buy all sorts of kits and ranks) These donations are paid for the servers and the builds, some servers have their own team to build maps so the owner can cash and not pay the team.
So that client did give me money for the build not that much since I'm new in this game tho.