Any inventors out there, or dealt with intellectual property?

[Josh69]

I've got an idea, and I think it's a good one. Those I've bounced it off have agreed, but I don't know where to start. I have a need for a product, and this product would appeal to many, thousands I think, that also need this product. It is motorsports related, and would be very affordable to the masses. However, I have no experience in CAD drawing, and don't know where to turn for advice. I'm afraid if I mumble a word about it, my idea would be vapor and turn up elsewhere. It is a simple idea, and there is no product on the market to compete with in my search.

How do I work with a CAD designer to make a prototype, and consequently a CNC machinist, or other fabricator without them stealing the idea, or selling the plans to someone else?

I don't have much money, even after selling my PT car.

I know at some point I'll have to trust someone, but I can't even apply for a decent patent without some engineering advice and quality drawings. I'm a fine artist, but some of my idea will need engineering advice to see what aspects are feasible or cost effective/prohibitive.

Advice appreciated!!