So I went to the Home Depot to get some lumber and such to make myself a new 16" box for box squats and a 4" rasied platform to do elevated DL’s from. While gathering my good I hit the gold mine. I ended up getting both pre done for $4.
They had/have 4"x8"x16" solid concrete blocks. So I Bought 4 of them @ $1 each. With just these four I get a 4" raised platform to pull from by putting them side by side. By Stacking them I have an 8" 12", and 16" SOLID box to squat onto. They had the same dimension in 2" thickness as well so you could adjsut the box In 2" increments as well.
Just thought some of you that w/o at home or in a gym that would allow it might find this usefull.
Not very mobile, but Solid, and versatile.