You can search Google for "RV Relocation Special" or you can follow links on this page.
There are only few larger RV rental companies in Canada and USA which offer RV Relocations (One Way Rental) for discounted price.
Rentig RV is usually pretty expensive but with relocation special you might be able to afford RV travel experience.
RV = Recreational Vehicle
Fraserway RV: www.fraserway.com/vehicle-relocation-specials
Cruise America: www.cruiseamerica.com/rv-rentals/rental-deals
Cruise America/Canada - multiple deals: Factory Delivery Deals, One Way Specials, Relocation from Phoenix, Canadian Deals.