i don't see how you go broke with it.. at the grocery store i go to you can find deals on meat and other stuff, like chicken breasts for $2/lb and decent steak for 3 or 4. not fatty pieces, just not the best cuts. rice and oats cost next to nothing, and other carbs like potatoes are fairly cheap too.

you're definitely skinny still. just stick with it and maybe look to switch up your workout routine and diet some