I doubt you will find landowners willing to let people shoot hogs/aoudad on their property for little or no money. Property is very expensive in Texas and potential liability is just to much just to risk it. And just to be clear, a liability release means nothing, you can still get sued and have to get a lawyer to defend yourself. It is not just about greedy landowners, but liability/dealing with people vs the benefit.
Now, if you are a farmer, you may get into an agreement with someone to come an shoot pigs for a low or no fee. But it's not going to be open for everybody.
Now, if you are a farmer, you may get into an agreement with someone to come an shoot pigs for a low or no fee. But it's not going to be open for everybody.