I noted that you have G-rated Tires on this trailer...I assume they are there for a reason...

As per FMVSS 120-Section 5.1: the sum of the maximum load ratings of the tires and rims fitted to an axle shall not be less than the GAWR specified on the Certification Label.

The 7000 lb. GAWR can be accomplished with the same 7000 lb. axle, by up-grading to the 235-85-R-16-G range tire which has a load rating of 3750 lb. each, at 110 PSI. This meets and exceeds the axle rating allowing the full axle capacity to be stated on the certification label.

I read somewhere that the 13 foot sw/8 foot wide weighs empty with LQ's 15,000 lbs. I emailed the company and I'm waiting for a reply. Also, I believe the 37 ft length does include the nose.....I would definately want a bigger awning. You'd think they would extend it to the first butt window. It would cover the side mud room .  I've been looking at 2-3 year old dually's and I do like the crew cabs. Here we go...

http://www.logancoach.com/trailers/living_quarters.html

Okay  just to clarify a little bit (as in, what was **I** thinking)...

The axle rating does not have to support the entire loaded trailer as a certain percentage will be on the tow vehicle, i.e., tongue weight. 

So - that's another question to get answered, what's the percentage of total weight for tongue weight and how does that relate to the payload of your tow vehicle.

The tongue weight percentage can vary based on where the axles are placed in relationship to the weight carried.

I agree Gone... 37' is most likely the total length. You can ask what the floor length is, though.  if you have a 15' short wall; and each stall takes up 40"-48" in outside trailer wall length, then add in the rear tack... you could have a good idea of the total length.