[Phanx]

Go install Bugger, or at the very least, turn on the "Display Lua Errors" option under Interface Options > Help. Trying to write an addon without any way to see the errors that are occurring is like trying to put together a jigsaw puzzle in a lightless room. Sure, you can do it, eventually, but it will take a lot longer and be a lot more frustrating.

Here is one section of code that should be triggering an error message:

barQWindowCheckButton:SetScript("OnClick", 
  function()
	if barQWindow:IsShown() then
        barQWindow:Hide()
    else
        barQWindow:Show()
    end
   QWindowHide = self:IsChecked()
	barQWindowCheckButton:SetShown()	
  end
)

You're calling self:IsChecked() -- but no variable named self exists in that context. An OnClick script receives two arguments; the first is indeed typically named self, but you're not assigning those arguments to variables, so they're not accessible to your code.

barQWindowCheckButton:SetScript("OnClick", function(self, button) -- fixed!

There may be other errors as well, and you should fix them before assuming you're implementing an entire concept wrong. You may be (I just skimmed, and stopped reading after I found the above error) but it's just as likely that there's nothing wrong with your implementation, and your code is just failing on basic syntax or scoping errors.