A few things I'd like to ask...
Is it necessary or recommended for 5 separate POE Switches?
-- 8, 16, or 24 port POE should work fine.
What model camera would you recommend for internal storage as well as on the server/NVR?
-- The hikvision 2332 and/or 2532 appears to be latest pics from this forum.
Will I be able to use my phone to access and monitor each camera? Is there a recommended application? I figure I can open ports to access them directly, but would prefer software I can manage from my mobile devices...
-- You can use
BlueIris app from your tablet, phone, web for remote viewing. Works well.
If I were to do continuous recording at high resolutions, what space am I looking at per camera for a 30 day retention?
-- You probably don't need continuous as motion detection works very well at a fraction of the space. Use storage spaces and raid 0 3 3tb 7200 drives together, get a 256g SSD for C: and only put BlueIris database on C:
Am I only needing one PC if I'm doing continuous recording off of 20+ cameras?
-- The latest I7 should be able to handle it, but you may need to adjust the FPS a little which should be ok
A gymnastics arena... for liability purposes, maximum video retention and angles is required to dismiss negligence