Where can I cheaply outsource code development and still get an NDA signed?

I have a project I need coded, I have programmers that are top notch but this is just too much, I'd rather outsource it, get it done and have my guys just architect/troubleshoot we are dirt poor and need this app to help us secure more capitol. Looked at students/interns/etc... this is just too much work. I need non-disclosure signed for people doing the work as there is confidential information involved, but cost is the prime mover here. Any suggestions?