timberframe is a great method, but is not really a DIY project. It requires precise woodwork and equipment (or copious manpower/mules/ropes - think Amish) to raise the basic frame, as you will be sliding at least 4 joints together - at the same time. Then the same sequence on the next section.
Your dimensions will require repetitive sections to be added, usually 10-12' (longer timbers are $$$ and even more heavy) sections and so on. Most of those sections will be at least 3 or 4 pieces already fit and ready to slide in, and so on.
Your location is important, as shipping/moving timeberframe kits and materials are expensive and a crane (or manpower) required to unload. When I "unload" material, I watch carefully to make SURE the first piece(s) needed are on top, the second pieces next and so on. This cuts down on crane time as well as making sure the work follows the proper install.
Did I say they are $$$.
best of luck