Cool idea, and congrats on living the "passive income" dream! ;) One quick suggestion if you're interested: I found the white text on light background on pages like this one a bit tough to read: http://www.thebigeat.com/uk. (Also reduces the professional feel.) That one change would probably take just a few minutes. That said, with $6k in annual income, if I were you I would seriously consider getting some quotes to have a professional web designer give the whole site a facelift. I'm not saying it looks bad by any means, but I wouldn't be surprised if a really polished, professional look had a noticeable impact on your bottom line, possibly paying for itself within a few years.

(If I didn't already have too many projects to work on, I would seriously consider making you an offer, but alas...)