A Corny keg is fairly lite in weight; I would think around 5 pounds empty.
http://en.wikipedia.org/wiki/Cornelius_kegsCornys have handles on the top and they are quite managable
I have a ton of glass carboys and generally keep them filled with iodophor and water when not in use. They are way too heavy to move around.
Adding bleach is a problem on stainless; can cause corrosion and pitting of the stell. We generally use iodophor to sanitize the kegs.
Thanks for the feedback.
Mike