A quart is 2 pints. A pint is sixteen fluid ounces of water and weighs about 16 ounces (avoirdupois weight.) A gallon is 4 quarts (8 pints) and thus weighs about 8 pounds. Five gallons would be about 40 pounds.
In some cases, if your mother is on Medicaid, she can designate you as her personal home care aide and you can get paid a small amount through Medicaid. If your mother has her own resources, you can draw up a contract agreeing to work as her home health aide and she can pay you a salary that you both agree upon.
The most recent figure was just under $117k. While this is certainly flattering to a stay at home mom, it is irrelevant when evaluating the cost of going back to work since it is calculated by aggregating full time salaries for professionals such as a daycare manager, chef, driver, housekeeper, etc. The 25 Best-Paying Jobs For Women Right Now.