Somebody gave me an interesting idea for using my expired 60 gal electric water heater as a compost tumbler. The idea would be to cut a square opening on the side and put a lid on it with hinges. The tank will be hung with a metal pipe "axle" up in the air so that it can be turned to help aerate the compost.
Here is my question: How difficult of a job will it be to cut the lid opening into the tank? What kind of a tool might work for it? Drill holes in the corners and saw with sawzall from corner to corner? Just trying to avoid a potentially frustrating trial and error experience in the case someone has some good advice.
Pete