It is not that difficult to build a server solution that will do more or less the same thing Kaleidescape does, but it is a lot of work and it won't work with UV licensing. I was able to buy a high quality NAS with 21.46TB of usable RAID 6 storage for about $2200. You can get about 35TB if you use 6TB drive for around $3000. Plex is not a great solution for fully lossless rips, as there are few clients that can handle that. You could do Plex and NVidia Shield combos. The other option would be high quality KODI clients. The real issue is time. Setting this up, ripping all the discs and getting everything tagged properly is a major undertaking.
I am doing this for a lot of my stuff, unfortunately, I have a ton of UltraViolet and Disney Movies Anywhere content. This may be addressed with the emerging Vidity standard, which is what I'm keeping my eye on. I love the approach Kaleidescape takes with their very well designed systems, but have a very hard time justifying the cost.
I don't care about apathy
Main System: Sony XBR75X940C * Marantz SR6010 * Marantz MM-9000 * MSI Cubi HTPC (OpenPHT/Aeon Nox) * Roku Ultra * Samsung Blu-Ray * Paradigm Studio/40 v.2 * Paradigm Studio/CC v.2 * Paradigm ADP-370 * SVS PB12-Plus/2 * Harmony Ultimate One * HDFury Linker (Zone 2)