Hi,
Mister, I have the experience you seek. I have a running bot using simlar principles where I work (I own a bot for a Service Level application for aggregating data from several softwares) - uptime on the bot has 5 days regularly, and I got it to be more reliable than the applications it is pulling data from.
PS: You don't need ahk 100%. Firefox add-ons ran by ahk can get you where you want with very good autonomy.
The best of luck,
Dorian