Going back to the first OT.
In the olden days, in some places, the entrance was on the second floor.
You could do that now and with modern electronics it would be easier than ever to have an at-will deployable set of stairs.
How I've imagined my dream residential fortress includes the second story entrance, a high curtain wall topped with unpleasantness, various cameras and such, as well as an "air-lock" type entry at the drive way.
There would be two sliding gates, as I pull up to the house a trigger the first gate and it slides open just enough for the width of my car. I pull into a space that is long enough for my car and has a gate at the end of it and a wall or fence on either side. But I only pull in just enough for the first gate to clear my rear bumper. And as soon as that is closed I open up the second gate and then drive in.
The gates and fences would be as high as the curtain wall and made to resist someone from climbing over them. In this way if anyone has followed me home I can "box them out" as they cannot get their car or even a person past my car. I've even toyed with the idea of having a "scraper". That is a bar that hangs down to just over the height of the car and will scrape off anyone who has had the gall to climb onto the vehicle.
At the main door it would not be flush with the wall but set back like in castles so that there is no hiding place. And yes there would be murder self-defense holes in place.
The door would be heavy and would include the usual hardware as well as a stout bar.
The whole building would be brick and stone, the windows would be thick and on the first floor too small for anyone to fit through.
And the first floor would not be living space. It would be the garage, the laundry room and so forth and would have retractable stairs to the second floor as well.
