Garry's Mod Murder Server

Hi, i just wanted to ask for tips and tricks that can improve this gamemode and make it more fun for Players, im looking to make it for 16 Players, i am also planning to put on my server many thinks like "Credits", with that people can buy a New Skins for Playermodel, Better Weapons for Murder, Better weapon for Sheriff, etc,Much Thanks for Advices!

Garrys mod murder is bad and no one should play it it is boring