Electronics

Flying Pig

The arduino is apparently very useful for flying things. I expect it, or something very similar, will be an essential component.

https://www.google.com/search?q=arduino+prices

Other elements would be communications (obviously, hands free...) and some independent/separate navigation tools (glorified GPS...).

I think basic instruments should be present, too: compass, altimeter, "attitude" meter (don't know the term, yet).

There may be two kinds of signal lights needed, ground bound and airborne.