There's no such thing as "cheap" tickets. You can get discounted multi-day passes from a number of sources but cheap isn't in Disney's vocabulary. I suggest watching for threads that discuss tickets at
Undercover Tourist, or big discounts through stacking sales on Orbitz with a good rebate on ebates.
Cheap Disney resort prices are anything but cheap ... even the cheapest Disney resort with a discount is going to cost more than the cheapest offsite resort.