Just imagine what would happen in a year from now
Imagine that you publish one book a week - that's 52 book a year. even if you only sell 1 copy a day you would make:
1 book sale a day x 7 days = 7 copies per week
7 copies x 52 books = 364 sales per week
364 sales per week x 4 dollar profit = 1456 dollar a week in profit.
So by next year you could retire from your job, fire your boss or move to a sunny place far away from your old financial troubles and that is if you take it really slow and just publish one book a week.