If server was the case I wished they would of asked for help.

You won't believe what you can fit on a 10$ server.

I for example run:

Ubuntu
Minecraft server
200+ websites
Teamspeak
TF2 server
Project Zomboid server
Emails
SQL Databases - My biggest in production table has 1.5 million entries and is 200mb
Java Servlets
Other crap I don't even remember....

But it has been running at 95% RAM Usage and 70% CPU for 125 days now 8)

Well if there are truly only about 20 active users and the server load is still crazily high, the culprit is most likely with the script. Some scripts just do not scale well, and its interesting and necessary to keep track of that.