How do I get a custom plugin created for me?

I think I might just be making my first WTB or perhaps even a WTT but I am not quite sure how that would work.

So here is my thing, I have a really awesome idea for a website. I have bought my domain name, I have added a free theme and put up a coming soon notice on it.

I have spoken to a number of businesses and people in my area and I am all revving to go right?

But now I don't have the skills and the ability to move past this point and I don't have a lot of money to throw at this project although I think it will really kick off nicely.

I need a plugin but I can't find something that adequately covers my needs. I don't think I want a script because I don't like the idea of having code on my website that I don't understand.

I have no idea how much something like this might costs so I don't know where to get started.

You know what would be really awesome? Is like a coding partner. Someone that can code this plugin and then if there are any technical glitches or issues any time they can deal with it while I do all the content creation and marketing...

But how do I trust someone to hold their side of the bargain and be there if there are any problems?

Has anyone got any feedback or suggestions for me? Razzy this is probably right up your alley and something you have faced before.