You can't go wrong with grass-fed ground beef. So many things you can do with it, besides just burgers. Another great budget stretcher is pastured pork butt or pork should roast. I can get these for about $4 a pound. Season it and toss in the slow cooker and you'll have shredded pork that you can use for tacos, salads, or just by itself. I bet you can easily stay within your monthly budget.