Sounds like that should work well with practice points, but not with broadheads. When I was shooting alot I made a target out of used drop ceiling tiles that I got from a local contractor. I stacked them up between 2" x 12" boards and used small cables and turnbuckles to compress the stack. This target lasted over 15 years and the most i saw any arrow penetrate was about 4". The tighter you can compress it the less penetration. i had to quit shooting about 10 years ago when I messed up my shoulder. I shot outdoor 3D in the summer and indoor 25yd. targets in the winter. I miss it.

I was on archery talk and some guy made a target of strips of carpet layered about 3 ft high. Looks like it stopped everything. I'll try to find you the link when I get home.

Ive read that a burlap bag stuffed full of its clothes works very well. I intend to do that when I get the time to build it.

They are kinda hard to come by these days but one range I went to used phone books stacked up about 8 to 10 feet high.

Do y'all have hay bales down there?

it will be a very durable target. Usually I use EVA mats and old jeans to DIY the target. It's very cheap and durable.

another option is if there is a hardware  store nearby, i used a cardboard box. bought  some cans of spray foam insulation and filled the box with the foam. it can be kinda on the pricey side depending on what size box you use. But the one I made has outlasted any target you can buy in stores. I have used it for 3 years now, and haven't had any arrows pass through it yet. If i remember correctly, a large moving box takes about 9 cans to fill it. Most of your store bought targets are the size of a medium or small moving box.

You can get a cardboard box and fill it full of plastic bags. Like the ones from the grocery store. It will stop an arrow.