How to move building material, including large timbers, onto my property?
I would get a flatbed trailer. The rig from northern tool is great for logs but your metal roofing won't work with that and usually when I have roofing delivery it is 20' sheets so a pickup is not the best choice either because of the length, however a flatbed trailer can handle both lumber, and the metal roofing. I made side boards for my flatbed and have hauled loads of bark mulch saving delivery costs. As a possible future use for the trailer, or sell it once the house is finished.