Like many others; I have read and read- trying to gather as much information as possible on this site (and others) for a while now, asking a question here and there in preparation for my upcoming build. Thanks to all who contribute to this great site!
About six weeks ago, I ordered a custom build cargo trailer. <It took me 2 years to decide on the size and manufacturer-haha.> I ended up going with a company called Double R out of Nampa Idaho and it is their "All-Sport" model. My intentions for the trailer are to use it for both business and pleasure. I will potentially be working up to 5 or 6 weeks at a time across the country- multiple times a year; and also hope to use it at the beach or on mountain vacations.
I should take delivery of it in about a week and hopefully that is when the fun begins!

The Trailer specs are as follows:
o 24'L x 7.5'W x 7.5'T flat nose plus 5' tongue
(it is a standard width axle, but I made the body more narrow by 8" in order to give some maneuverability and better viewing range- hopefully….)
o Rear ramp door
o 36" side door with screen with double hasp on bar lock
o 24" diamond plate on sides and rear; with 36" on nose
o Requested to only install half of the interior wall fasteners and bag the rest, requested no silicone on interior walls and no seam strips of plywood
o (2) 24"x20" slider windows with screen and requested the following " Install a square piece of 1/4" plywood in the window area that is 2" larger on each side than the window so customer can install his own wall liner without removing our window clamp ring." I really did not want to be installing my own windows- haha
o No "D" rings. In lieu of these; I had (4) Aluminum bolted in horse trailer tie rings installed on the outer walls ((2) on each side), to tie clotheslines and such
o No roof vents. No holes in roof at all! In lieu of these I had 1 set of air flow vents installed. These were supposed to be both at the rear of the trailer- on either side- where my 3' "cargo/garage" area is to be; but I see by a picture sent to me by the manufacturer that one was installed incorrectly at the front of the trailer…. Oh well.

o Spare tire package. Installed on the nose- up high (giving clearance for where the HVAC unit will go)
o 10ply tire- 16"- 8 lug wheels (the cheap Chinese tires will be gone- as soon as I have money to replace with LT tires- after my build)
o 7k# straight axles on leaf springs
o Rear roller guards
o Automotive undercoating
o 2" receiver hitch on rear bumper
See pic sent to me from dealer.
I tried to upload a drawing of my layout in hopes to get feedback on weight distribution but have not been successful on that. Not sure why- it seems no different that the pics which I was able to upload.... I will work on this.