Apologies if these questions have been asked before:
1. Is it possible to have my Apollo BTC change it's mining configuration from ECO to Balanced and/or Turbo Mode at night each night without any input from me? I'm thinking a kind of chron job/automation given this is a Linux box.
Yes, I did that. I configured Apollo so it's turned off/eco mode/balanced mode, depending on temperature read from external source.
You can achieve that by using Standard Apollo via USB, connected to any controller like Raspberry Pi. In Pi, make a script for launching each mode, and add entries to crontab.