I want to build a proper server with room for 40+ HDDs to move my media server to and have RAID 1. I know a lot about PCs and software, but when it comes to server hardware I have no clue what I'm doing. How would I go about building a server that has access to 40+ RAID 1'd HDDs?
I have 300 blu-rays ripped full quality and that only takes 8.28TB. My entire media collection is just over 12TB. I have a friend who has a massively larger library and even he gets by with a NAS. My NAS only has ten disks and I have 84TB of storage. You're over-estimating your needs.