Consider the 22 sport.
If you go to colonial airstream's website, then go to new trailers, and then 22 sport, you will find a 2 minute video on the unit, and also a 30 minute walk thru video.
I suggest that you look at this model, because:
It is the narrowest of any new AS trailer,
It has the longest bed of any new AS trailer,
It has the widest bed of any trailer in the 16-22 foot length,
It has many operable windows, which would provide good cross ventilation if not using AC,
It has an operable window in the bathroom. Most trailers do not.
The table also converts to another bed option.
Weight is 4500 pounds which is likely the top amount you could handle with your current vehicle. (please check your specs)
Bed in the 16 (new models) is just a bit smaller than you may want.
Bed in the 16 you posted must be set up and disassembled to use the table, and kind of blocks the door aisle when up.