Hey! I think the Memory and CPU stats are fine. The /tmp partition, may or may not hold, depending on how your clients upload files. But, the fact that it’s on your mind is good anyhow.
The last thing I’d say is change your apache mpm configs (if you can, if you don’t need PHP libraries, you should). Here are a couple of topics on it. The first details the mpm settings we use, the second says a little bit about where to drop the files (with some formatting). I say this, because everyone is likely going to connect around the same time and that can be a struggle with mpm_prefork.