Ask HN: As a non-tech solo founder, should I hire this dev to build my MVP?

I've been working on an idea for a web app over the past several months, creating detailed mockups and designing the framework and functionality. My goal is to build a company out of it as I believe the concept has potential and is built to fulfill a direct need I have in my full time job. I have just started learning the basics of programming but feel that I wouldn't be able to reach the level of proficiency necessary to hack together a suitable MVP within any reasonable amount of time. I have a bit of money saved up so I'm looking to hire somebody to build it for me.

I spoke with a Rails developer tonight who I was referred to by a freelance dev I met with to hash out the details of a functional spec, who has a lot of experience and is available to work on the project. I am excited to learn more about his capabilities but find myself at a crossroads:

Do I pay a higher hourly rate now and get a clean app out there in the wild, or do I find somebody on elance or guru who will do it for cheap but might not be as clean? As a non-tech founder, the goal is to gain enough traction with the app to eventually attract devs to work on it in a co-founder/CTO type role. I have a bit of $ but not infinite and would definitely need a fair amount for legal fees and other costs associated with the business. Curious to hear from anybody who has been in a similar situation before, or who has good advice to offer.