Thanks for your advice, and as you suggested I just dropped the price down to $2.99 for the Kindle version (I can't lower the Print version much more, as it's already just above cost for printing...), but it may take a few hours for the change to take effect.
I never had any delusions of actually being able to live solely on revenue from book sales (although that $400ish a month example you gave is about what I make currently... Not a realistic number to expect, I know, but anything's possible...), but it would be nice if the best case scenario played out and by some miracle my book's series became the next Harry Potter type franchise... Not likely, sure, especially with no real marketing strategy or money to afford to give away free copies to help promote it, but who's to say what may happen in the future?
Really, I'm just hoping it sells well enough that it encourages me to finish the series, as the story's origins are very personal to me. I started working on this story with my mother in October of 2004 with her helping me with initial edits to the first written bit which was essentially the ending to the first book. Over time, I continued working on the story and developing the world and events leading up to that ending, all the while not showing any of it to my mother again with the promise that I'd show it to her to read when I was finished with it. October of 2005, however, she passed away from breast cancer, so she never did get a chance to read it... After that, I made it a personal goal to finish the story and get it published (originally was intending on trying to go through a publishing house, but indie markets became more accessible and available since then). Beyond that, there was no real "plan" per-say on how to market it, I was focusing too much on just finishing the story, which was difficult since I had to scrap whole chapters and re-write several times...
As it stands, with no one reading it, that drive to finish the story is a little diminished... Hell, I still can't even get any of my friends to even buy a copy, let alone read one of the prototypes I'd printed out, and it took almost 6 months to get one of my teachers at school to buy one despite her, as a college writing teacher, pushing her students (including me) to publish something (I think I might be the only one out of that class that actually did, albeit independently...)...