I need to raise money for a few different reasons.
Right now, though I have an MVP-plus, a lot of the work that's being done is being done manually (e.g, analysis, report creation/generation, etc.). If I want to scale and get beyond a handful of beta-customers, I need to automate those processes. I've analyzed what it would take, and it's something that's out of my range to boot-strap. If I don't automate, or even partially automate, I'm going to be stuck with a handful of customers. With automation, I can add dozens, if not hundreds of customers.
Secondly, not only are some of my customers asking for a whole new incremental feature set, but I see the market ripe for the picking. In order to develop these new features, it'll require a new wave of development (for mobile) that I also can't self-fund.
Outside money would help in both of these, allowing me to move beyond perpetually having a few customers to growing this venture into a growing business.