Hardest riddle or one of theM

Alright I will post this answer Ina.few weeks good luck!

A piece of rope weighs 4 ounces per foot, and passes over a
pulley.

On one end is suspended a weight, and on the other end, a
weasel. The system is in equilibrium. The weight of the weasel
in pounds is equal to the age of the weasel's mother in years.

The age of the weasels mother, plus the age of weasel, equals
four years. The weasel's mother is twice as old as the weasel
was, when the weasel's mother was one-half as old as the weasel
was, when the weasel's mother was three times as old as the
weasel.

The weight of the rope, or the weight at the end of the rope,
is one-half as much again, as the difference in weight, and the
weight plus the weight of the weasel.

How long is the rope?

I object, an ounce is not a standardized unit of weight

One pound is 16 ounces.

lol, a pound isn't either. This one looks like a good one for me but unfortunately i don't have time to figure it out.