Got a free 6x12 with dual drop gate for helping install fence for neighbor. Needs tires lights and a deck. Now What wood should I use on the deck heard bad things about the new pressure treated wood and corrosion. How long would regular pine last vs oak.. I know major price difference for 2x6x12 in oak wondering if it would outlast life left in trailer.. Only trailer for light one man business but I do haul 5-7 cords of wood a year to my house for heat.