It may sound like a bad idea to add another responsibility on top of an already agonizing workload. After all, managing a household is certainly plenty of work. Fortunately, many modern day conveniences allow for a household to still run well without sunup to sundown backbreaking labor. On top of that, many things people consider hobbies can be considered work if you’re good at them. Photography, painting, and writing are all legitimate careers. Is it going to pay your bills? Probably not, however if you enjoy your “work” then any money which comes from it is simply a bonus. Instead of a job it’s a break from the monotony.
Is your child able to be taken care of by someone else for the same, or less, money than you would make working full or part time from home? If so you can work from home and be available for any emergencies which might come up. For example, my son’s feeding tube is the only thing a babysitter would encounter over an eight hour period. With a weeks worth of training, someone could easily learn to do that.