as someone who has been in your situation, ramen is actually really expensive, both in terms of $/cooked oz and $/nutrition.
I highly recommend you switch to brown rice, wheat pasta, beans, produce, and cheap cuts of meat. Add in a slow cooker if you don't have much time.
Oh, and as for this soylent product, I would run screaming away. I only read his recipe up to the carbs section, and the fact that he thinks all carbs are the same because they end up as ATP is mind-boggling. It's as if he isn't aware of the huge problem with HFCS. Any biochem undergrad can tell you about the incredible complexity of the feedback and regulatory mechanisms of the body; to focus only on the end product of a mechanism is ignorant at best.