Buying a NAS for a family cloud?

[Enquiries]

Hi, I don't know if you can help me. I'm in the US, thinking about constructing a family cloud. I have some experience with NAS (WD My Cloud paired with Sonos to listen to my music library), but am now thinking of something more ambitious. I'd like to put music, photos, and home videos on a NAS which can be read to and written to by family members around the country (roughly 4 or 5). I have probably 2 TB of content now, and it will of course grow. Currently I organize my music in iTunes and my photos in Picasa (notwithstanding the fact that it is no longer supported!). Of course, happy switch away from either iTunes or Picasa (PLEX? My son likes it).

Is this something that can be done at reasonable cost and with reasonable technical skill?

Thanks for any advice you can provide,
Peter Rathjens