"Queen-sized bed with a door"
Do you mean a door to the bedroom, or a door to the outside?? If the former, then just about ANY 28' C will work.
Our 2004 28' no-slide Gulf Stream Conquest has been an awesome entry-level MH. Feels "spacious" and bright; and is small enough to be nimble. Is almost identical to the Four Winds 5000. When we ordered ours, we said we needed to tow 5000# (a car hauler with Ed's drag race truck), so they beefed up the frame to accommodate the extra weight.
I'm assuming you'd be looking in the age range similar to ours: one thing to check is whether the tires have been replaced? Even if the tread looks great - age is still a factor, especially if it's been sitting in the sun.
A 28 footer is a common rental size: if looking at a rental, be sure to check the roof carefully since many end up at NASCAR races, being used as a "group viewing platform". The rental companies say "we don't have ladders" - and *I* reply "Go to any race and watch the guys who bring a stepladder along"...LOL!
Good luck with the search!
Ed, Deb, and 2 dogs
Looking for a small Class C!