For some reason when I have this mod enabled all the memory for my computer is eaten up till game lags out and crashes. Any idea on what may cause this?

That would likely be an issue with the Rust client and the CUI that Rust provides. All that the plugins do is send JSON that the client uses to generate CUI. In the case with this plugin, it constantly updates this by sending destroy requests and then that JSON again to have it redrawn.

Ok. So after a lot of Googling I have found the issue. It is with the Vending machines, if it is set to true it will cause your memory to be consumed and crash the client. 

"Show vending machines (public broadcast only)": false

Fixes this issue. It has run perfectly ever since I changed this. 

Thanks