My homemade archery target is so cheap
 

It isn't that it's so cheap and made from objects not normally used for an archery target.
It isn't that, but that the target is so cheap, I couldn't even sell it, myself, on the open market. Even after 20 years.

Why who would buy it to capture an expensive modern arrow and a very expensive broadhead of today.

Probably would go broke paying for the insurance to back up some guarantee. !!! I know when I'm defeated. I'm just destined to using the homemade target myself. And me saving money has nothing to do with it.