The theory for investing with money sharing as above looks easy, but in life of course there are many challenges, I have been working for about 5 years and it is very difficult to leave money for saving, especially for those who are already married and have children, of course it will be difficult, and in my opinion the solution the best is an investment that can produce productively.
You're right but the question is can you invest with a one month salary? Definitely no! You have to save first before you invest in whatever you seems to be profitable for you. The important of savings is not only for investment but also for unexpected challenges. I actually don't know why people always attribute problems to married people and assume singles have less problems. Lol