Hi Laura!
Disney is a terrific, memorable experience, but yes, it does cost money even in the best circumstances...
Once set, Disney ticket prices generally don't fluctuate between seasons (resort room rates, however, do). Currently, a 1-day ticket for an adult will cost $82, $74 for children 3-9.
However, you can normally get discounted tickets if you have a AAA membership, or serve in the military.
Also, a number of Disney guests have went to the online site Undercover Tourist, which, I'm told, is a good site that offers discounted ticket prices.
So, you may want to do a little navigating. Just use caution, a number of other sites promising Disney discounts are not too legit, so do your homework before passing on that credit card information.
Good luck with all your Disney plans!