I would also agree that a rear kitchen design could lighten the tongue weight.
If that's the case with the model you choose, pack heavier items in front storage compartments or add a second battery on the tongue etc .
One other thing to consider. If the model you choose has a fridge located on the rear wall, then the leveling of the trailer from side to side will be more important than a floorplan with the fridge located on a sidewall. (read the 3 vs 6 degree leveling rule ) .
Its easier to make a TT level using the front to rear elec. tongue jack opposed to placing boards under tires.
It is also a factor, if your travel style involves parking your TV/trailer combo in parking lots while you sightsee or eat.
Some people find it easier to shut the fridge off for those periods of time, things will remain cold as long as you do not open the door and you won't have to level the rig.
ex. of the 3/6 degree rule in modern rv absorbtion fridges.
leveling the fridge forum post