Running cost difference 2-stroke vs 4-stroke

[Minihank]

Do you have any idea about running cost difference in between 2-stroke vs 4-stroke?

It seems less maintenance frequency with 4-stroke motor. Does it mean 4-stroke motor is cheaper than 4-stroke motor except lube cost?

I'm going to purchase second hand motor, 2-stroke one is much cheaper than
4-stroke one, but wondering which is cheaper as lifetime cost.

Any information is helpful.

Thaks in advance.

Minihank

[rodbolt17]

maint on the cooling system is the exact same.
depends on the size of the outboard.
twin F250's are about triple the maint cost of a pair of ox66 250's.