If this is completely non-commercial and you have an amateur license you could probably use AREDN as a backhaul instead of HaLow. We've gotten wifi going from a panel in Elysian up to Wilson on AREDN.
100w from the Verdugos should be pretty substantial. I regularly make 70cm FM contacts on 446.500 from Elysian Park down to San Diego at 5w.
FreeBSD has had a hard time supporting Intel Thinkpads, and they're making progress at getting better. Supporting Apple arm64 is a much heavier lift than that.
AREDN users would probably be pretty happy to have a node at 1500' in the Verdugos.