I expect the answer is "No, get Pro." But it sure would be convenient if there were a way to set up a batch file to render a bunch of projects that all have the exact same properties.
I bet that if VMS supports command line parameters there is some scripting software out there that could drive it.
No, but ... you can launch Vegas many times and set up a project rendering in each one. Let them run simultaneously and they'll eventually all finish. The properties don't even have to match; every one can be different.