Yipes... Buy your airline ticket in advance (priceline.com or somthing) and see if any of the rental places at the airport will rent a flat bed truck or a pickup with a tow dolly (I'm thinking enterprise rent a car). Most airport rental companys will let you return a vehicle to another location for a fee, so you only pay for the 2- 3 days rental and the drop off fee.

I would guess a rough estimate would be around $800 to $900 for the whole ordeal (Airline ticket, 3 days rental, drop off fee, gas)