We use HAI but only pursue automated systems. This kinda ensures that we can make some money plus do more than just slam out security systems.

As far as the prewiring is concerned, are you asking where door contacts, motions, etc need to be wired to? Also, don't forget that a lot of people are using cell phones as their home phones, which will require a Cellular "call-out" product that usually costs more for monitoring.

Do a ton of research and go through the Level 1 classes. There is some money to be made. Good luck.