Traveling Through 80 to Become a Son-In-Law: the Wonderful Life of a Miracle Doctor

[Countryside + miracle doctor + multiple heroines + son-in-law + getting rich + invincibility] Modern life is too frustrating, so I traveled through time and became a son-in-law. The beginning was miserable, but I accidentally received the inheritance of a miracle doctor, who became a god with one injection and cured all diseases. He specializes in curing diseases that others cannot cure, and has since made a fortune and created a magical village...