This is what I do. I have a local VM at home running a web server that can hold such files, but in AU decent uplink speeds are mostly a fantasy, so in the case

This is what I do. I have a local VM at home running a web server that can hold such files, but in AU decent uplink speeds are mostly a fantasy, so in the case OP described of needing to send to multiple people I'd upload it first to a VPS I keep that serves a similar purpose. This way I only flood my uplink once. Obfuscated path for some very basic privacy, though of course you can encrypt and email password if that works better. If it's going to happen semi-regularly, and the files are large and there are multiple recipients, then I'd look at BitTorrent. Most people have a client installed, or can install one fairly painlessly. Biggest challenge there would be that 6881 (etc) are often blocked, or at least monitored, on corporate firewalls.