I'm taking my family on a cross-country adventure this summer for 2+ months. However, I can't imagine going roundtrip from Fort Lauderdale to Seattle with two little kids. The idea of getting there and looking at all that roadway back to Fort Lauderdale is just too much.

Problem: I cannot seem to figure out a cost-effective way to take a car in one direction. If I take my own, I will need to ship back or sell. Rental car costs are outrageous for these extended distances (unless you know something different). I'm at a loss. Ideas?