Get a Raspberry Pi and run Cumulus MX on that so that you don't need to keep your computer running. You saw how the interface for Cumulus MX is just accessible via an internal webpage. Any time you want to see or interact with your data you open your browser on your laptop and point it to the Raspberry Pi. It all neatly runs on the Raspberry Pi, but is easily accessible from laptop with nothing to install on laptop.
Raspberry Pi has the following advantages:
- minimal cost
- minimal space (run it headless; no monitor, no keyboard, no mouse)
- minimal power use to run 24/7
- can be totally silent if you put it in a Flirc case (no moving parts, no fan) or alternative heatsink cases like Argon NEO, Geekworm cases.