I have came to a point after spending as much as I could possibly afford (around $200) where I am really considering whether it is even possible to build up a list that would generate a full time income (4k+ subscribers) without spending hundreds, if not thousands of dollars. Even if a person had thousands of dollars to invest in building a list, there are virtually no risk free ways in which to do so (except Cory Friedmans course, which gives you a list of around 5k subscribers).
Has anyone built a full time income using free traffic methods to build an email list? I strongly doubt that this is possible these days. It is very dis-heartening to finally realise that all of the time and effort I have invested is for nothing due to not having the financial means to invest thousands of dollars online.