Capacity calculator.
Pick a console, then add the access points, cameras, phones and door hubs it has to carry. You'll see the compute load, the storage required, and the retention you'd actually achieve. Indicative — a survey settles the real numbers, but it's close enough to budget from.
Network
N/AAssumes 10 clients per access point.
Protect
N/ATalk
N/AHandsets, softphones and mobile clients registered to the console.
Access
N/AEach hub drives one or two doors depending on model.
Days retained at this configuration
Storage for 30-day retention
Sustained write to the recorder
PoE budget, cameras and APs
Drive bays
Compute figures are estimates and results will vary.
Console capacities are indicative — confirm against current Ubiquiti specifications before ordering.