Inviting many people is a tradition I guess, I mean I don't only think its a money thing, most GC's would feel rude if they didn't invite many people, even if they didn't know them that well! Thats just how it is! I mean everyone knows everyone anyway Lol!!:D
(Personally I love Cypriot weddings!! It's a chance to have a good knees up with your familly and friends! )