Can I run the node on a raspy?
You can. Could take a time to compile though. Plus it will stress your SD card. Look in the Moonstone forum, there is a guy who compiled Moonstone DAC code for Raspberri and run successfully (
https://moonstonedac.com/threads/running-node-on-raspberry-pi.9/). The same could be done for Extreme, but be sure the stress to your device will be more "Extreme" too

. I am sure it will work well (to some extend), especially now, at the beginning of the blockchain.