I move my dad's EU3000is around several times a year, I'm 33, 6'4'' and in good shape, it's a cumbersome generator to move. Your arm width is wide and it is ~155lbs. My dad takes a hand truck with him camping just for moving the generator.
That being said if it's being hard mounted to the tongue then I would go with the single 3000, if you ever plan on moving it around then the 2000's are far better. Two 2000's are easier to carry at the same time than 1 3000. The 3000 is pushing 155-160lbs full of fuel/oil.
Not to mention the pair of 2000's provide 3200w continuous and 4000w peak, vs the 2800w continuous and 3000w peak of the 3000. That's a nice difference if you ever plan to use them as an emergency backup at home. The 2000's also have the ability for extended run tanks.
