I now have a part-time job, so I cannot relate to your situation(s) entirely.
That being said, I know that sleep deprivation is a very bad way to go, so you might need a temporary break here. If there is a hell, it's where you cannot sleep.
I am not talking about leaving MP aside, but about calculating how long do you project this situation to continue before you reach the desired amount of earnings. If it's 6 months, it's worth pushing a bit harder. But if it's longer than that, you might need to find an alternative.
I was (still am) having the same dilemma with money; for how long can I afford these expenses, e.g. MP, proxies, VPS, etc. before I earn x amount of money. I had to give up certain things that I have considered a necessity all my life. But it's a trade-off. I hope to get a return in the near future
Let us know if we can help you in any way.
I respect you dearly for pursuing your dreams under such conditions.