Hello,
With that server I don't think you will run into any issues provided
a) You have correctly set up your server
b) You don't have the traffic of Google
c) Your template and your other components are well written.
I have personally seen site with half a million items and a dozen authors working with no problem.
It is all in the server setup and the infastructure.
JoomlaWorks Support Team
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Please search the forum before posting a new topic :)