I have a Marquises 56 which I bought to do exactly what you are looking to do. Good choice with the Eleuthera.
Twice I've moved the boat from Oyster
Pond to Simpson Bay, through the bridge and to a dock
solo. As long as someone is there to assist on the lines it isn't a problem but these are relatively short distances and I motored. But direct to the question, yes you can sail the boat solo just like any other boat. You will be every time all your guests arrive. They really don't make or break your sailing ability.
The real issue would be can you handle the boat if something goes wrong solo. Like if you lose an engine
or a rig failure. Could be a real problem, but what are the chances? Not high if you maintain the boat.
I'd feel comfortable docking
, and sailing the boat in near shore areas. What would be difficult to do solo would be Med mooring
and flying my spinnaker