This chap Carl eats, sleeps and lives, so cannot do what you are suggesting 24/7. I expect his Gemini based alarm system works fine. I have no idea, as I don’t have one fitted. My now 12 year old van came with a Strikeback alarm that only partly worked, so I can do something about that or not as I choose. So. I have no preference here.
My question to you about the tracker he uses was: is it as easily electronically found or overcome as some or most commercial trackers are? Which of course renders them useless if discovered.
As already replied to you, any particular Qs you have why not ask direct for the best answer. Ive given you the phone number. He really is very approachable and will tell you all you need to know.