Parcel out those parts of your project that you know someone with experience can bang out in less than 4 hours, but would take you a few days reading docs and advancing by trial and error. Payment integration and similar APIs come to mind. Prepackaged components can have an even better bang/buck ratio.
Another obvious area is web design. Between 99designs and PSD slicers, you can have a great homepage for $500 (or a decent one for a bit less.)