Hello, At first you have to fly till Bangalore from Hyderabad. From bangalore, buses are easily available for Gokarna and its overnight journey. you can check in Makemytrip or Redbus. Upon reaching Gokarna, stay at Kudle beach shacks(1000-2000 Rs per night) and it wont disappoint you because you will be just 10 steps away from the beach. Cover Kudle beach and Om beach for next day, and you can start for Murudeshwar via road and it will take just 3-4 hours from gokarna. Private vehicles are available for murudeshwar. Visit the murudeshwar beach and lord shiva statue and stay over for the night in a local hotel there. Start for Udupi the next day , you can take private vehicle or train from murudeshwar. Visit Malpe beach and St. Marry's island (ferry available from Malpe beach). Come till mangalore for Bangalore buses. Buses are easily available from mangalore to bangalore. And then fly back to Hyderabad. Wish you a wonderful trip :)