Yeah, I don't think I'd go with less than RAID-6 (or full system redundancy plus 1 drive redundancy in each). Rebuilds just take too long, even with an in-chassis spare on RAID5.
Unfortunately Areca is really the only controller I've found which is well supported and does RAID6 fast.
would those be managed at that price? because it's a hell of a lot more expensive when you factor in the cost of devops to make sure it stays working and fails over properly.
I know what you mean. I have a lot of issues with AWS, but the AWS console is exactly what my manager needs so he can do things himself. Simple things such as AWS load balancing fails when we get any decent amount of traffic.