Four straight 2x6s, a lot of glue, a mortiser, planer, sharp chisels, band saw, Forstner bits, a block plane, oscillating spindle sander, and a rubber mallet are all you need
"Build it right. If the wood can withstand seven centuries, I would build a house that is so constructed as to withstand a millennium. With this attitude, I would keep woodworking."
—Go Taek Yeong, Skill Holder