Should you be willing to leave your boat in Greece, well protected in a local Marina and use it whenever you are on holidays, I have a suggestion for you:
You could leave your boat in Lesvos island, at Setur Marina in Mytilene and I can look after your boat while you are away.
Should you be willing to do some repairs, I can get things organised, coordinate and supervise the works needed to be done.
The Marina in Lesvos does not get very crowded and even if Lesvos is not in the list of your visiting islands, trust me, you will fall in love with the island.
In any case, we could always arrange deliveries upon request.