The only trailer I can think of, at this size, that would possibly come close to this is the
Lil Snoozy. No door, but more of a sleeping berth. How quiet you can make the snoring would have to do with the
weight and insulation in the "curtain."
Next up with be the
Scamp 5er and
Escape 5er (and possibly a
Bigfoot 5er, but you'll only find one used). Due to the main sleeping area being in the loft. You might be able to "block" the snoring.
You need to know these trailers have very small cabins, and they're more a "great room" layout, where everything is visible. The only "room" would be if the trailer had a bathroom.