Reasons why the disciples followed with questioning
Jesus was operating under an open heaven. When a man works under open heavens, he doesn't struggle for things in life, things flow on their own accord.
JESUS carried carried the message of hope and life.
The disciples followed Him cause they had the confirmation that He was truly the expected messiah. The confirmation came via the miracles Jesus Christ performed.
And He went throughout all Galilee, teaching in their synagogues and preaching the good news (gospel) of the kingdom, and healing every kind of disease and every kind of sickness among the people [demonstrating and revealing that He was indeed the promised Messiah].