Hello and welcome! It's difficult to say how hard tickets are to come by, since that depends on a bunch of different factors that all can vary from year to year and we don't really know about til after the fact. The event first sold out in 2011, and has sold out every year since. Rather than have a ticketing discussion here I'll point you towards the
Tickets Discussion board to find out more info and raise questions about that aspect of the event.
Looking at the bigger picture of the event, I'd say +1 to what Agaton said. For a lot of folks who wouldn't be traveling from anywhere near as far as you, getting tickets isn't the biggest challenge. If you haven't taken a look at the Survival Guide or First Timer's Guide (links are in my signature), you may want to read through that and see just what you all will be getting yourself into.
In the meantime, tell us about yourself and your mates? Are you just looking for an exotic festival getaway, are you planning on building or making something for the event, or something else?