The real answer is... hire no one and go Lean Startup! You need to de-risk the opportunity by formulating your key assumptions and validating them with the least amount of time and effort and expense.

An example... I helped a woman with an app that was going to provide a luggage free experience for travelers by sending them an entire wardrobe for their trip that would be waiting at the hotel.

She didn't need to make an app or hire anyone at first, she needed to validate that people actually wanted the service and validate she could deliver on the promise that 1) the clothes would fit 2) people would like her choices for them 3) She could execute the logistics 4) People would pay for it.

In the end, she used basic free tools and surveys to test each assumption in the assumption tree and went from idea to revenue in 8 weeks with NO development and NO hires.

She has made the risk minimal because now she is automating the experience with a designer and developer.

I have helped 50 founder do this same thing... works like a charm!