Free: Contests & Raffles.
Some 2x6's for the jacks and tongue extras for under the tires to level from side to side, and some of those stick on levels. If your having your wife help you'll need a bottle of whiskey too! I know I do.
Not sure what your hitch set-up is, but you really should have a Weight Distribution Hitch like this one:http://www.curtmfg.com/part/17052