... No Bilco Door on the side of your house? Might be safer and less expensive to install one; then do the ole slide it down the plank like they do in NYC. I'd avoid the method you are planning - those shoulder/back sling carry straps can be killers...
You will probably have just as big a problem ( maybe bigger ) when you find out the limitations imposed by your future speaker selection...
You will probably have just as big a problem ( maybe bigger ) when you find out the limitations imposed by your future speaker selection...