I have a media server with over 1000 Blu-ray and DVDs on it (and a few UHDs).
Recommendations: decide if you care about subtitles early. Ripping subtitles off blu ray is a pain in the ass. They’re not stored as text but rather as images, so you need software like SubtitleEdit to OCR those images back into text. It gets it wrong all the time. Ripping off DVD is easy, so I just grab all sub tracks off DVDs.
I have six 8TB drives in a RAID6 configuration using MDADM on a Ubuntu Server box. It’s using a very cheap motherboard with integrated CPU. I had to add a PCI SATA card to have enough ports. Same machine hosts all my photos, security camera footage, and other files.
Movies are ripped on my gaming PC using makemkv and Handbrake. I haven’t bothered finding a method for re-encoding UHD since we’re only going to watch them at home where bandwidth isn’t an issue (so I have like 300GB of LoTR lol). I picked up a bunch of cheap used drives from goodwill (mostly DVD drives), so I’ll queue up 5 or so movies before bed and let it run overnight.
Movies are hosted on Plex and watched on phones, tablets, and AppleTVs around our house.