Tell him that your home would not pass the licensing inspection and that you wouldn't be able to be certified.
If that doesn't work then let him read this. IF he makes it all the way to the end then perhaps you can go to work and he can stay home and run a child care center.
You have to have baby beds for infants, cots for toddlers up through preschool age kids, you have to have a required amount of toys per each child, a required amount of space per child, outdoor play areas that have both open and shaded space, outdoor equipment, and more.
Books, toys, trucks, under age 3 toys plus infant toys and toddler toys. Bedding, food, extra utilities, wear and tear on your household property. You have to purchase toys and books and beds and car seats and supplies for each child you are licensed for.
You have to do any repairs on your home, no loose boards on the deck, no clutter or dangerous areas on your property, no water on the property like a pool or anything, no pets that aren't fully up to date on shots and stuff with no record of biting or being aggressive, then you have to still go through the licensing inspection where they go over your home with a fine tooth comb looking for any reason to deny it.
Extra car seats and extra insurance on your vehicles. What if there was an emergency and you had to go to the ER? You'd have to take the kids so even if you don't drive with them in the vehicle you still have to have those things on hand.
Plus you'd have to buy liability insurance on your home and property. You'd want to get personal liability to cover someone suing you for a bruise their kid got from falling down.
Does he have ANY idea how much this will cost in the beginning? Before you can even go get a license? Then you will have parents that won't pay, if you get a contract with the state to accept families that get child care assistance those parents might not have enough money to pay their part, checks will bounce then you'll have to pay to take them to court for bogus checks.
If he wants to quit work then he better get out there and find another job.
In Oklahoma the most kids one can watch in their home with a license is 4, and your own kids count. If you take a baby or toddler, which brings in the most per day then you're still only going to make $30 per day with that child. Maybe a little more but I don't know what the prices are like in your area. That's not enough to pay any bills for a man who just doesn't want to work.
Let's say you don't have any kids at home and you and your husband pass the rigorous licensing background checks. You get licensed for 4 infant or older kids. So you could have an infant, a toddler, a preschool age child, and even a school age child or any combination up to 4 kids. If you don't take infant, depending on your state regulations that might mean you could take 6 kids age 12 months or older. That would be even less money since toddlers and older kids don't pay as much as an infant.
You could make....let's just make up amounts and see where it goes.
Infant $30 per day.
Toddler $22 per day.
Preschool 3 year old $18 per day, let's say you have 2 of them. So $36 per day.
$30+$22+$36=$88.
Not bad BUT then you have to buy their food. Pay extra bills because you're going to use extra water, extra heat or AC because they have to have their area at certain temps. They can't be cold and they can't be hot. You have to cook meals that have 1/3 of their daily food requirement in them. Your menus have to be approved by your licensing worker. If they come to your door for a surprise inspection and you aren't serving exactly what's on your menu for that meal and that time of day they can close you down and fine you. So you have to have milk, veggies, fruits, meats, and wrap it all up in a cute little bow.
Let's say you spend $30 per day on food. That's $58 left to you. You have a credit card bill for all the stuff you had to buy to pass licensing that's $100 per month. Your utility bills went up by 1/3, the extra insurance payments each month are $100....does he even begin to understand?
You won't make enough money starting out to even make $20 per week. Your credit card payments alone for the supplies and food will be enormous. Once those things are paid off then you will have that money extra for your salary.
Child care is not a profitable business if you do it right. You can make a little money at home but it's not anything like what he's making as a plumber's apprentice.
He sounds incredibly lazy. Someone in that family needs a job and to get up and see what their family needs. You'd rather sit and crochet that go to work so it's all on him. Not to be mean but if you got a job, even a part time job, wouldn't your family be better off?
Perhaps you could go to work in the school system as a teacher's aid?