I think the cost does make a big difference. Yes pork is cheap, you can feed it just about anything and it will eat it. Think about a cow, you can't give it slop...it won't eat it. So to feed a cow you have to have certain feed! I also think there is a spiritual aspect as well. God calls the swine an abomination and the enemy knows that and has been using that to defile God's people for a long time now!