Well that is indeed difficult to do. Especially if that person has the same amount of income as the number of needs that must be met. Then of course it is not easy to set aside money for savings. and well setting aside just $1 won't make much of an impact. Then the solution that we can think of might be by cutting spending more. but if that is also not possible. then another solution is to seek additional income through a side business. but not everyone can do it. and if you can't do that then I don't think there is any other solution.
There may not be time for additional work, or it will be detrimental to the family. In this case, the optimal outcome would be to try to increase the salary at the current job, or find a higher paying job. Only in this case is it important that additional earnings be set aside for further investment, since you can always find where to spend money, especially when there is only enough money to meet your most necessary needs.
Everything about additional work should be agreed with the family, if you have one. If there is no family yet, then this will be easier to do, but you still need to think about how it is comfortable and you have time for personal time.