Need help before pressing the buy button

[u/Parking-Cow4107]

Hi! I am building my house and want to use unifi for cameras network and access. Security either Ajax or paradox.

Street Gate: G6 Entry outside -> UA-Hub-Door Relay 1 = Pedestrian strike. Relay 2 (Aux) = Car gate motor.

Front Door: motorized multi-point lock -> G3 Reader outside -> UA-Hub-Door-Mini. Using the Mini's dry contact to trigger the motor.

Garage: G3 readers + Hub Minis to trigger the main garage door motor and the internal garage-to-house door.

Automation: Using Home Assistant to avoid double-scanning. If Protect camera detects line-crossing at the porch AND the street gate was unlocked in the last x mins -> HA unlocks the front door.

A few questions:
Has anyone here triggered a motorized multi point lock? using a Hub Mini's dry contact? Is it reliable? Siegenia/Winkhaus or other?

Since the base G6 Entry has no screen, is it seamless to just trigger the street Hub's Aux relay (car gate) via the UniFi app or HA dashboard?

How is the UWB on the G3/G6 readers? Is it truly "hands in pocket" with an iPhone/Apple Watch, or do you still have to wake the device?

My street gate Hub will be in the house rack (~30 meters away from the gate). Assuming I run thick enough wire (2x1.5mm²), will voltage drop for the 12v pedestrian strike be an issue, or should I really put the hub at the gate?

Thanks!