Without knowing your exact base plan, layout, and structure, it's impossible to say. However, you can get a rough idea by looking at specific items' costs and thinking logically. Just a single Tier 3 wall, let's say Aquilonian, for example, costs 2 shaped wood. Walls are the core building piece of any base, and even for a smaller design, you'd probably need at least 50 walls. That alone is 100 Shaped Wood right there. Then you've also got doors, fences, ceilings, roof pieces, all of the crafting stations you'll be placing inside that base, and the weapons and tools you'll be arming yourself with. You have to carefully plan your steps to accurately count how much Shaped Wood you need. I'd advise just going with the flow and meeting your Shaped Wood needs as you encounter them, ensuring you always have an extra couple of hundred Shaped Wood lying around that you can use at a moment's notice.