I built mine,and IMO,it's nicer than the Ranch King trailer blind that sells for over $7k. It cost me 1/3 of the price to build one from scratch.It is 6'x7' and 6'6" tall inside.
It is insulated,water tight,and very cozy to hunt out of. I live in it for 3-4 days at a time when I go hunting,and have a twin mattress inside that I just lean against the wall under the shooting shelf. I have installed two marine batteries and solar panels to supply power to an inverter for electric power,and I'm going to plumb in a gas line for my Buddy heater so I can use a big propane tank instead of using the little bottles.
I did buy a wider axle for the trailer,this blind is pretty top heavy,and I wanted the tires to set outside the blind for towing behind my truck.I just bought another set of fenders and bolted them onto the outside of the original fenders.This is the best money that I've ever spent for hunting gear!