Large family, single income

We are just starting our lives together - me and my fiancé. I'm a planner it's just how I am I suppose. We've had the big talk about kids and although we don't have the exact same number in mind, there's the ability to compromise on how many we would like to have.

I like the number 4. He likes the number 6.

Anyways we know that once we start pumping out kids, my work situation may have to change. I love my job but it is very physically demanding and I would not be able to work while pregnant as I would basically become a liability and there's a high chance of hurting myself and unborn child. I am a heavy duty truck and coach mechanic for your reference 😄.

Now we are thinking more than likely after a couple of children (1-2) I'll then transition to a SAHM - hopefully when I'm pregnant with baby 3.

Now here is my thing. I'm not a very creative person, I do not enjoy the concept of selling things like shampoo on some pyramid scheme. How does a family (with possibly 4-6 kids) make ends meet with one income? Like is that possible? No offense but I'm not selling shampoo lol I'm a tomboy at heart I don't care about that kind of stuff and I'm very introverted too.

Please share how your household stays afloat and makes life work as a SAHM with one income from hubby and at least 4 children.