You've calculated how long it will take to break even on your salary alone via becoming a successful blogger... and it's an optimistic 18 month crawl in which helping other entrepreneurs is some sort of priority alongside programming and kitten blog posts.
Some thoughts:
1) if traffic's not coming to you for your product the vast majority of it won't care for your product, your best case scenario on product-irrelevant blog posts is awful traffic and most won't even deliver that
2) don't worry about other entrepreneurs', they can find blog posts in lots of places and they're nowhere near as important as your company
3) Buffer and Groove each have the luxury of over a $million in investments to pay people to write content that falls off HN, Reddit etc like it never existed while other people focus on building their businesses, you're on your own so you're doing one or the other really
You have a finished product that some people are paying for, why isn't $3000 MRR your goal for this year? That is surely possible somehow.