Some thoughts here:
1. If your wood or cork mounts are horizontal instead of vertical, the orchid will do much better.
2. Whether you need moss and for how long depends on your watering routine.
3. Telephone wire works for me and it is available at Radio Shack. Split the large gray insulation and you will find 4 smaller insulated wires inside that are ready for use.
4. Whether to mount or not depends on the orchid variety. A little research goes a long way.
Jim