Building a product is a long term investment. If you are planning on building a SaaS product or a subscription based service, you have to be in it for 2-3 years before you start making an impact and your business generates good money. Of course there are exceptions to this, but they are very rare.
Zendesk, Salesforce and many other subscription based products make millions of dollars every year. They have been in business for 5+ years now.
279 Days to Overnight Success : The Art of Non-Conformity is a book by Chris Guillebeau. Definitely worth a read.
It takes a while between releasing a product / a blog / a software to when it starts making an impact on a lot of peoples lives and start making good money. I hope you have the patience and have budgeted to be in it for a long time.