EarlyMon, thanks for that huge post, I see some things I'm going to read up on.
To add to your post, specifically the mention of SwiFTP, there are 2 other apps that I have tested which can do this:
WiFi File Explorer
Both will setup an IP address and port number that you can access with your browser to transfer files, etc. On WiFi File Explorer, you can configure the port number as well as a password, whereas you cannot configure the port number with Droid PhoneControl. Both apps only run when you open them and specifically tell them to start, and you must turn them off when you are finished.