Yes, slow cookers are great. Just throw some meat and vegetables in there with a little liquid in the morning and come to a yummy meal.
Some other ideas:
Buy a whole roasted chicken at your supermarket. Around here, they're $5-$7 for a chicken. That's at least 5 meals worth of meat (1/2 breast x 2, leg/thigh x 2, wings and back) depending on the size of the chicken and weather you eat the chicken meat alone as a protein or in pasta or a salad.
When my son was in college, he used a sandwich maker a lot (they're normally $15-20, but go on sale for $10). Two slices of whole wheat bread, a slice of cheese, some meat, and some spinach leaves or sliced peppers and you've got a hearty sandwich.
Pasta's not terrible. Buy whole wheat pasta. Keep some frozen veggies in your freezer to add to the pasta with some meat.
Age 61, Height 5'9"
March 2010 145 lbs, Jan 2013 173 lbs
1st Goal 145 lbs 5/25
New goal 140