I'm going to make a Deathrun server.

What addons are a must have, I have a budget I can use on Gmodstore.

There aren't very many addons, so I suggest custom coding, but here are the few I could find on gmodstore. https://www.gmodstore.com/scripts/?0=sea...h=Deathrun

I would recommend csgo knifes in the server even though they are in half of every deathrun server

Yeah, A lot of addons would need to be custom. Also you could add a url radio from gmod store. So players can chill out while playing.