Oh my oh my. Making XP through New Senntisten's emerald cauldron has taught me two things:

1. You can never have enough oak fences (ugh)

2. Logging labor is going to be in HUGE demand

Each run of the emerald cauldron uses about 16 stacks of logs JUST FOR CRATES - that doesn't include the charcoal cost to make them or the wood needed to make the stupid fences. After you have the crates, the recipe requires 840 charcoal (840 stacks of items) to compress the crates in the compactor. Then there's also the added cost of saplings which are a pain to get. If you use oak saplings only, you're also paying 32 charcoal a stack to convert it in the bio lab.

tl;dr GO LOGGING IF YOU WANT MONEY