Everybody is ignoring the mouse in the room... taste.
Food safety has been discussed, but the taste of old canned food does go off. Personally, I don't eat stuff out of date. I used to, but I'm old enough and I've worked hard enough that I think I deserve food that tastes at least good.
If you do eat it slowly, as you plan, you're talking a dollar or two a week. I'd rather eat well.
If you want to hold on to them for a while more in case we get into a survival situation... that's a different story. If it's a matter of staying alive, you can eat most anything.
Except another TA member, of course.