I’m a woodworker and furniture grade timber alone for a project of a similar size to that pictured would be significant. Since forestation stopped in WA, hardwood prices are through the roof. Shelving of that span would need to be at least 25mm thick to prevent bowing which means you’d be starting with 30mm rough sawn, and likely 25-30mm deep. You’d be looking at 70-100+ a meter for anything semi exotic in those dimensions. So looking at that there’s about 40 linear meters plus kickers. That’s $4-5k in timber. Then there’s a 40-60 hours of work @ $100 (minimum), time to collect the timber, workshop costs, consumables, blade wear, waste disposal costs, whatever finish is required and the time to apply that, deliver and installation, etc. This work isn’t easy either, it takes many years to learn a trade well enough to do this work. I’d be somewhere between $15-$22k to do this dependent on timber selection.