[HillRat]

To be honest, live streaming isn't something I've estimated before, so I wouldn't be able to give you an informed opinion. I do know that Cloudflare, at least, can save livestreamed content for later replay, so there's probably an efficiency there you can make use of. Whether they're cost-efficient for you is another question; as you say, it's easy to stumble into massive bills without realizing it until it's too late.