I would say it was really essential to gain your income. Ebook seem to be easy sale through PPC, like AdWords or els. But SEO would take longer
well im willing to start november! anybody who can guide me a little bit im sure i would figure it out but i wanna be on the safe site! but hey thanks for all you comments so far really helpfull!
Yes it is essential but you have to learn the pros and cons to not waste ppc cost. I suggest you get free ppc first at hophunt.com.
I wouldn't say PPC is essential. But, it depends on your site. If you already get good SERP traffic then doing search PPC may not be as much use, however content might be another cost effective choice.
50$ per month only???? it depends on your niche. For me i'm spending more than 25$ per DAY... not month.