Visual SVN is a prepackaged combination of several things including Apache Tomcat. You can assemble these yourself without Visual SVN and then configure it any way you like.
The other option is to put additional Visual SVN servers on other machines.
However, the question is what you are trying to achieve. For example you can have plenty of repositories on one server and plenty of projects in each repository. So long as you place the folder with the data on a large enough drive you will see that (virtually) you won't run out of space. Monitor the size and you should notice that it doesn't really require a lot of space.
What are you trying to achieve that is not covered by this?