That is an excellent set up. I don't think I could afford the components to keep that thing running more than about an hour. Without having any auto feed setup, I can reload faster than me and my partner can shoot them up.
A couple days ago we bought some 3/8" thick scrap plate ($100 worth) and so far out of one piece, I have built 5 body silhouettes and 5 each 9" square targets. I so far have built 2 saw horse style contraptions to hold the targets. We wanted to be able to move them rather than be fixed in one spot and I had a bunch of 2x4, 4x4 and 2x6 lumber. I built one proto-type to see how it would work with a single silhouette on it and it worked perfectly. The 3/8" boiler plate doesn't show any damage from .357 or .45 LC ammo even when shot from a rifle at close range. I was afraid it wasn't going to be thick enough but it seems to work well enough. They ring pretty good when hit also.
We also got some 1/8" or maybe 3/16 (haven't mic'ed it yet) armor plate that I will make some .22 targets out of later.
We got the plate for $.22 per pound prices so it was reasonably priced. Compared to buying on 16" prefabbed circle from AR400 plate for $100, I think we did well. I did use about 500 PSI of oxygen and 50# of acetylene cutting out the shapes so far, about 10 welding rods welding on the chains and about 8 hours of my time to build the two sawhorses and mount 2 silhouettes and 2-9" targets. More to come later.
Tomorrow I go for my CCW class.