Extended Mechanical Warranties- If you buy a new or used rig from a dealer, they may offer to sell you a warranty contract. Most of these are money makers for the dealer and insurance company. They are full of loop holes, exclusions and requirements for keeping records of period inspections and servicing of appliances and chassis. New rigs have chassis warranties and individual appliance, etc., warrantees. Add-on warranties don't take effect until after chassis and appliance warranties run out. Better to anticipate expenses for tire periodic tire replacements, maintenance, repairs and upgrades, parts and labor, and maintain a "Pearl Harbor" savings account for when/if you need it.