We did make upgrades on this 5th wheel.  We put in a new AC unit in the front bedroom last year to along with the factory installed AC unit(2 AC units total) and installed an extra battery among other things.
The garage is 10' and has motorized bunk beds that move up during transportation.  It sleeps more than 6 people!   The kitchen table converts to a bed too. The bunks are king size and very comfortable with the foam mattress pads. There is a screen for the garage in case you would like to keep the back garage ramp open. We have a great mattress in the main bedroom.  There are 2 TVs included too. The actual model number is RP299.  Give us a call with any questions.