The tricky part is that to monetize, you either need to master enterprise sales (which means that the product will take on some PHB-pleasing features that developers despise so they can get through procurement departments), or you need to be acquired by a big company looking to round out their developer tools offerings.
almost everything is a difficult market these days. at least with developers, you know where they hang out. try marketing a SaaS to farmers or construction companies online.