I was just reading in "Wisconsin Woodland Owners" monthly news letter that only deep underground mining is more dangerous than logging. Yet logging is the only activity that people with no training, no understanding of the risks nor how to avoid them, using poor or no safety equipement will just jump right in!
I have no knowledge of your expertise in scouting trees, grading, identifying dead from live trees, being able to determine stressed trees that may pop or barber chair, felling, limbing, skidding or any of the other hundred things a logger needs to do. You should check with a forester for a plan, have the trees to be cut marked. If you are going to cut them - get training on how to do it and buy the safety equipment. Chainsaw boots, pants, helmet, gloves and face shield at the least. Clear the work area and 3 escape paths for each tree. Buy and use wedges. If you don't already have a GOOD saw (Jonsered, Husky, Stilh) get the lightest professional one with the shortest bar. Expect to pay 3x what a box store saw will cost. If you are doing firewood, a 14-16" bar is all you need. You can drop a 30" tree with a 14" bar.
If you want to buy some neat toys, er tools, and maybe make a couple bucks, you may want to also get a band saw mill and turn the boards into lumber. You can make a very cheap solar dryer that will work in the winter (plans online). Or you can just fell, limb, buck, split and deliver firewood. Plan on clearing about 2.50 to 3.00 an hour! If you can sell arm load bundles of wood to campers or in town romantic fireplace burners, that's where the small operator makes $$. The big operations have firewood processors that can turn your acreage into stove sticks in no time.
jb