Re: If you could have one thing....
Hookah - 2 hose 31" ice rotator (autoseal ofcource)
Shisha - Al fakher barhaini Apple
Coals - Vivi coal - Coal exlusivevly for hookah from egypt (not seen them on the web)
Hose - Nammor Hose - never owned one but tryed it a the local lounge.
Cleaning -The normal brushes + vinegar
Accessory - portable stove to light the coal. ( if you mean bowls and such, i'd go with a medium funnel)