How much would it cost to install a trap door next to my front door, right where someone knocking would stand?

NO. I actually enjoy the company of paid escorts. That not even cheating.

Its a business transaction.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.