i say go look at a hunter 27 years 75 to 84, they are solid boats, heavy for their size. they can be found for under 10 k in perfect condition. they are very roomy for the length, have over 6 foot headroom. they have wheel steering, a diesel, head with holding tank. the only thing is hot water is rare on a boat this size, so are showers. you might have to go bigger
here is one for an example 1980 Hunter 27 Sail Boat For Sale - www.yachtworld.com
here is one for an example 1980 Hunter 27 Sail Boat For Sale - www.yachtworld.com