So here is the design I went with.
As for portability it breaks down into 5' sections.
As for cost - I will say $30 for all parts. I used steel conduit pipe 1/2" at 10 feet sections for $2.45 each.
It works! Holds this 1/2" AR500 silhouette target that weighs just over 50lbs.
Legs don't move and the biggest draw back is the size. It takes up a lot of room.
I have not field tested with actual rounds but I have kicked it hard a few times to test stability.

All the designs have their merit. And granted if I had room to weld, etc then more design features are available.
My focus was for an average "Joe" to go and put together a stand from available parts with only the need for some basic tools.
And keeping in mind the cost!
Sent from my iPhone using Tapatalk