Congrats on launching your 1st business! I've learned that finding developers is much easier if you have something visual to represent your idea. To save money, I spent 2weeks and used Keynotopia iphone wireframe kit to design what I would want the app to look like. The tool is very simple to use and only costs $39. I could send it to you via email if you want. Then take that either to possible tech cofounders, a development firm or even potential customers to get feedback.
After that decide whether you will outsource or look for a partner.
I'd delay looking for angel funding until you have done some testing on the market and have validated your idea( a la Lean Startup mode). Great business ideas are only great when customers are willing to use/pay for them.