Good God man, even a Newfie can save $25K in 4 years!
Seriously though, I put my deposit down in 2009 at the SCI show in January. Booked my flights in October 2009. Paid the balance of my daily fees in April 2010. Paid everything off in September 2010 after the trip (had a few extra trophy fees - these things happen). Paid the shipping in December 2010 and still have yet to pay for the taxidermy (should be done in June 2011). That's 29 months from start to finish. Put in a couple of years of saving before hand and you're set. Plus there's nothign saying you have to do the taxidermy right away. A buddy of mine still has his stuff in a crate at the taxidermist from 2009 (I believe).