Non Technical Hacker Seeking Support in Defining the Next Step

I have been following IH for about a year now - during this time I have been working on a product idea that would help local, small service-based businesses (Plummer, roofers, lawn care etc) deploy a website through an intuitive process, designed with fundamentals of SEO and maximizes lead conversions - and most importantly, helps manage and track leads..

I'm a technical marketer and my passion is identifying unique and simple solutions to big problems. I have a ton of work into this idea, however my would be co-founder is unable to continue the journey due to life and work requirements.

My life mission is to control my own time and break away from the 9-5, while having fun doing it. I'm not giving up, but I'm not sure what my next step should be and I could use some help from the community.

Here is where I'm at:

1. Identified the problem (and have experience solving it through traditional methods)
2. Researched market potential.. it's big - there is definitely a gold nugget to be found
3. Researched and interviewed potential customers
4. Built mockups / wireframes / flowcharts and even a pretty medium fidelity prototype using powerpoint.
5. Conducted several user interviews with mock-up with positive results
6. TBD...

I know I need to talk to more of my customers which I will- however I'm trying to avoid paralysis by analysis. I know there is major potential here, some research and some is the vision (you have to go with your gut sometimes right?) -

So what should I do next? Build a landing page and try and get sign ups (seems logical)? When should I find someone to build a working prototype? Should I find a co-founder (if so has anyone had success doing this with IH?) or should I hire a remote developer for the initial build?

Any and all feedback / encouragement appreciated.