Long story short. I am looking to buy a cheap 12 ga. for deer hunting (does for meat) in Iowa for the next couple years then to have after I (hopefuly) return to Alaska. I do not do a lot of bird hunting, but would like to chase Ptarmigen a couple times a year then use it primarily as a back up gun. I assume I will want a rifled barrel because of the Iowa time? Cost is of the utmost importance I will likely be shopping at Wall Mart or something like that. What do I need to look for in a gun?