Ok, here is my experience with cheap targets:
Specs: Target must be mobile (light weight, compact, easy to assemble).
I was on a hunting excursion with a buddy and saw a small portion of a plowing disc sticking out of the ground. I thought, hey I bet I could use that for something. I dug it up and took it home.
This last weekend, I decided to weld up a simple collapsible frame for the disc. Welded some chain to it, painted it white with some old paint that I had laying around and I had my target.
Steel rods (5' long)= $1.50 each at the Home Depot garden center. Disc = Free, Chain = free (don't remember where it came from)(I don't throw anything away). Cross bar tube = free. End tubes = free (old weight bench).
Here are pics of what it looks like:
And here is what happened after shooting at it from 523 yards:
Rifles used to hit target were .270Wby mag using 135 SMK @ 3,330 FPS & .300Win Mag.
I was shooting off a bipod with long legs for shooting over tall grass, with no rear rest. I had a hard time staying on target so I used the old method of jerking the trigger when my crosshair crossed the target. Hit the disc every time, but that was the only goal, no grouping attempted.
My buddy shot his .300Win off his knee with just hold over and hit it every time after 2 doping shots.
Ok, the target did not hold up too well, but it made a really nice sound each time. I need to find a cheap source for these discs, as they are the perfect size and light weight for packing into areas where you can't drive a vehicle. It's quick to tack a chain on and go shooting.
This may not be for everybody, but it's cheap and quick.