I have 7 ground boxes built, well actually two are up on a platforms about 8 ft up. The 5 that are on the ground were built on runners so I can just hook up the 4 wheeler and move them easily if I desire. I've been hunting this same property for over 15 years, they don't get moved much, they don't need to.
I have one that is 6' x 8' that I built to be able to hunt with my father when he got older and his eyesight was getting pretty poor. He was seeing double the last year he tried to hunt with me at 79. I sat in the box with him and he killed a medium eight point at 60 yds with one shot. I saw the deer coming towards us and told him to get his gun ready as I opened the window. When the deer stepped into the edge of the field I asked my dad if he saw him, he replied "yeah, both of them" and started laughing. He said "which one do I shoot?" I said "you pick" he said "I'm going to shoot the one closet to the ground" He did and the deer only ran a few yards.
He was as proud of that deer as any he had ever taken and I was even more happy for him. We both knew that that would most likely be his last chance at hunting. He was born in 1919 in the hills of Tennessee, where hunting as a youngster meant food on the table. I hunted with him from 8 or 9 years old until that last trip with him when I was 43. He was in the early stages of Alzheimer's and Parkinson's when he made that last hunt with me. We always talked about hunting, and all of the great memories we shared together up until his death last year at 84.
Sorry to get off track, thinking about the big ground blind for two brought back way I built it to begin with.
There are all at least 4'x5' x 6 ft tall, with sliding or fold up windows, nice padded office swivel chairs, carpet, heaters, shelves.
After 30 plus years of sitting in treestands, and getting old, I like to just kick back and watch the deer in comfort.
Kim