This could all be achieved by a Texecom Hybrid system with a couple of keypads for both area's, at least then you get notification in the house when the garage is being turned over.
Can you get a cable to the garage from the house?
I doubt anyone on here will have used it.
Fancy website but I doubt it will be comparable to a mainstream wireless system.
Looks Yale'esque and I doubt 2 seconds is enough to disable any part of the kit but I'd imagine it's one way wireless in any case.
Personally I'd spend your money elsewhere.
Safest way is to enter engineer mode and disconnect the cable fully from the panel end, take a clear photo of the connections first to make connecting back up easier.