I would enjoy beans & rice for a couple of weeks but not the same version straight through. Would get some tortillas too so some of the days could be burritos.
As a cheap nutrition strategy it's solid, and I can now buy anything I want at the grocery (budget not good enough to eat out a lot but essentially no limit if I cook from scratch) and still will make beans and rice pretty often, it's delicious. I got "Good Mother Stollard" beans and they are so delicious I planted some to grow this fall.
OP should just raid the refrigerator & pantry first though, he can probably make it on what's in there.