If the Buddha said its not acceptable to possess money for
monks, I think monks should adhere to the precept whichever
tradition the monks belong.
There should be a person (layfollower) in the temple that can
help the monk by safekeeping the money in a savings account which
lay followers donate to the monk. If the monk need something, that
person can just use the savings account to buy for that monk.
Anyway a monk shouldn’t have many world possessions, except for the
robe he is wearing, toothpaste, toothbrush, toiletries etc. If a
devotee were to donate a condo or car to a monk, I think the monk
should reject it as he does not need that.