Ragnarok Mobile Private Server Setup

I am putting together a private Ragnarok Mobile (ROM) server dedicated to my own closed-door community and expect it to handle roughly 50-200 simultaneous players at peak times. Stability, low ping, and smooth instance handling are therefore non-negotiable... (Budget: $250 - $750 USD, Jobs: Android, Android App Development, Database Management, Game Design, Game Development, Linux, Mobile App Development, Python)