Help with finacing a wedding?

my fiance and i plan on marrying in about two years in the spring of 2010. We at least want to save $20000 for the wedding and take out a loan for another $20000. is that a good idea we have good credit. Is there other options ,do you know of any good banks that offer low interest rates.o and dont be a idiot with a wise dum *** answers like dont get married.