BT-1 Wireless webcam: $US 149
3M MPRO110 Micro Projector: $US 300
= $USD 449 (= $AUD 626) plus something for shipping.
Tape them together, point them at a surface in arm’s reach, set up a screen-sharing videoconference with someone else with the same setup, and you can share a projected workspace. Cheap, fast and adaptable.