If you want to put in a small amount I'd advise to put in 1.5M and leave it for 10 days. But I don't see why you shouldn't just use all your money though. Just put in all 10M and go back every couple days and cut maples to increase your %. They only take 75k out of your coffers if you have over 750k, so having 10M in it just means you won't have to add any later. For your workers, I'd advise a combination of coal, maple or flax. Something like 10 coal, 5 flax, or 10 flax, 5 maples, etc depending on what you want.