European Sea and River Cruises

Are cruises around the Greek islands expensive?

So i decided to save my money and go with my friend to Greece next summer. We be staying in Athens where his dad lives and Rhodes and Crete because we got relatives there. But i had this idea of taking a small cruise around the Aegean instead of visiting one island ( like Santorini or Mykonos) and paying for hotel. So are they expensive? Do you think a small cruise is worth the trouble? Or should i just go to Santorini or Mykonos and pay for hotel.

If you will be staying in Athens there are daily cruises of the Saronic islands, worth taking the trip.Or use the hydrofoil boats to go Aegina, Poros, Spetses, Hydra.
Most cruises stop at Myconos, Santorini, Patmos, Rhodes, Crete, Corfu.
You have to check if boarding from Athens is feasible since most cruises start from Italy. Others take on board from Corfu and Preveza. I don’t know about Athens.
The cost varies according to the days on board and the location of your cabin.

MSC Musica Cruising the greek islands