Nice script! I would go with at least 1GB RAM, so it's not swapping to hell and back. I've had some odd experiences (like internal compiler errors, or signal 11 core dumps) when trying to compile coin daemons on a memory constrained VPS.
It is correct, this script is meant to be for Ubuntu 14.05 Desktop users that want to compile the Ubuntu Graphic User Interface - can be done on their own machine or virtual server. Compiling Windows Binaries on a machine with these specs will take most likely two days. I prefer 6 cpu /16 ram as it only take a few minutes to compile the Ubuntu Graphic User Interface and about 20 minutes to compile the Windows Binaries. Would be nice to know if this will work on the Windows Subsystem for Linux.
H