First NAS, possible multi use

[Enquiries]

I am researching getting a NAS for home use. It initially was for family photo backups from existing mycloud and current cell phones. I am into home automation and have been a cord cutter for several years streaming from YouTube tv, Netflix, Amazon, hulu, spotify family... I am considering trying Plex. I also have two ring cameras, but am planning on moving to an nvr and replacing the cameras. I am looking at a DS920+ for the main need of photo storage and main media storage location. Then adding separate PC/raspberry/nuc for the processing of plex and or nvr when needed. Is this a good idea or is there a better way? Looking for an economical, flexible, expandable option.

Thanks in advance