Bluetooth
You mention that Bluetooth will not be allowed to turn off unless a wired mouse it connected to the computer. This is not true.
My bluetooth turned off on its own and my apple wireless mouse would not work. So I had to take my dell mouse and connect
it to my apple computer to enable the bluetooth function. If I did not have my dell wired mouse I would not be able to turn my
bluetooth function on for my apple computer. I recommend that people have both a wired mouse and a non wired mouse.
You can buy any wired mouse to use with your apple compute they all work. I have a mouse with a track ball and it is just fine.