They are not really hard to set up yourself unless it's your first one. And that's the rub, for you.

That is exactly why those products are only available to dealers. The manufacturers cannot possibly field all the questions that end users would have about how to make ONE SYSTEM work correctly. They will, however, field questions from installers who do system after system -- that represents a much smaller amount of HELP! calls, as each good answer will be remembered and used in another system later.