Built my own for about 45ish dollars. 10 for a pulley, 10 for a cable, a 2x4, had the 1x10 for the deck, 10 for stain and 10 for screws as I was out.
Is it perfect, nope, does it get the job done without spending a small fortune, yes it does. It's about 24 inches deep, 26 inches wide. It is light so it will move if you are not on it. Works for belt squats, planned enough space to add the edge of my bench for chest supported rows as well. I liked a lot of the designs out there I found and took elements of them. I'll probably use my squat wedges for a touch more depth on the squat, but otherwise works great so far! Let me know if you have any questions! This started by looking at some of the options on alibaba for the 180ish range, then i went down the rogue rhino path and realized, i can't fit that in my gym nor do i want to spend 2k.
knocking myself down two points for build quality as there was one board that is slightly crooked, hidden from view. I also probably should have gone 2x6 instead of 2x4 for the frame to get the extra couple inches of range.
Performance
Value
Build Quality