It is constructed out of 1" black steel pipe and 2"x6" boards. I initially had my doubts about 12 screws holding up my body weight, but it feels incredibly solid. I've jerked and yanked at it and it just doesn't budge.
The final price for supplies was somewhere between $150 and $200. This was a little more than I was hoping to spend but well worth it for the final result.
So far I've done "Murph" and "Tabata Something Else" on it. Looking forward to many more good workouts to come.