Interesting thread. Congratulations on finding your boat. It sounds like a great deal! It will serve you well!
One other which maybe got lost in the mix is the Albin 25/ 26 aft cabin--which is only 8'6" beam and has the two cabins, with decent berths.--and could truly be a 2 couple boat which is trailerable. Most of these had a 36 hp diesel. There were about 2000 made!
There is a 30 foot boat which sleeps more than 6 comfortably--and has an enclosed head and stall shower. The beam puts it in the perhaps than less trailerable status--and that is the Carver 30 aft cabin, sun deck. I owned one of the two produced with single Volvo 150 hp diesels (2 two were built with two 150 diesels also)--most are gas engines. But they have an aft cabin with a double and single bunk, a convertible couch to make a double in the pilot house, and then a big double/queen foreword! Three sleeping areas all separated.
As for beam trailering--I had a boat with 9'6" beam and I did not like trailering it--even though the beam on my RV is officially 8'6", the awnings, mirrors, etc--make it realistically closer to 10 feet wide. It is harder for me to pull a trailer 9 1/2' wide, than drive the RV.