1. If you want to save money you should use a sacred clay hammer for double exp. 2. Until level 19 or so you can't use oak planks yet, so you just have to lol about until level 15. 3. From level 19 build oak chairs etc. whatever uses the most planks until you are level 33, then start building Oak Larders. 4. I'm not sure on what servant, I guess you'd best pick the highest level one, and just let him fetch planks from your bank. Exp comes in with about 4.5gp/exp, so with 4 mil you can get about 1 mil experience.