Gigabit connections are available almost everywhere, for a cost of around $120AUD/month (usually 1000 mbps down, 40mbps up). Look at a provider like AussieBroadband for details.
2 drives won’t raise any questions - just say you’re a videographer if asked.
It’s completely stupid, especially when carbon itself is untaxed. You’re spending $1B to suck something out of a vast and difficult medium that’s getting chucked up there willy nilly by anyone who wants to? Why not spend the money putting systems in place to block its initial exhaust? It would be far more cost effective.