Addressing the two core problems of Son of God and Son of Man:
First: Are they one in substance, purpose and function?
Did Jesus BECOME the Son of Man, having pre-existed as the Son of God?
Does Jesus ever cease to be the Son of Man?
Second: Why Did Jesus Constantly Use the Son of Man Designation?
Jesus speaks of himself as Son of Man 82 times in the gospels – 69 in the synoptics, 13 in John.
The 82 occurrences were not limited to his earthly ministry.