These drums are readily available on Guam just about everywhere and the price is right, free or very cheap ($5).
Get the drum with the removable lid, that way you don't have to cut it and you can put a handle on it and use the drum as a smoker. The grill and lid from the Weber 21" Kettle BBQ pit fits perfect on a drum.
All you really need to do is cut a rectangular hole on the bottom of the drum for air flow and to insert your choice of fuel. The stand-up model allows for a hot fire but a lot of distance from the meat. Adjust the fire by adding or removing your fuel on the bottom. Here are a few pics of drums in use.
Until next time....