50hp is 50hp. 4 strokes are heavier. 2 strokes burn more gas and need oil.
Both are now pretty complicate

The Honda 4 stroke is about the same weight as a 2 stroke but with that said I
agree with the first poster. This guy would probably be as happy with a 2
stroke. 2 strokes are usually the best choice for guys who use the throttle as
a switch. (off or wide open)
If he added trolling to his list of requirements I would say 4 stroke since
they are a lot better at low RPMs