The most important thing you can buy is a good resource book. There are plenty listed in the book section of this forum. Most of these books were written by fasting professionals who have much knowledge on the subject. The hows, whys and whens are explained pretty well and then anything else you can't figure out is up to you to investigate (a place like curezone is perfect). :)
You don't need a real expensive juicer. I've used a Juiceman Jr. for the last 8 years and have no idea how it's made it through my long fasts. It just keeps going...
Fresh juice and water, herbal teas and broth only. A constant travel may be an issue. I've camped for four days and had juiced grape and carrot before going and then kept them in a cooler. But by day four they didn't taste real good.
Elimination is a MUST. Most reccommended methods are enemas and lax tea (one or more enemas - every day). This will be an issue with travels.