How do you ever get ahead??

I know that we are always going to be broke while we have kids in the house, but how do you make it when you keep getting further and further and further behind? It is one thing after another, and sometimes you just can't let it go.
Like the vehicles. We have to have a vehicle. We have to have two because Donnie works so far away, and we need something that is big enough to hold us all, which would be bad for a commuter vehicle.
We get the vehicles all working, and then we even got them paid off! That's a big chunk of change we have in each paycheck now! But I don't know where it is, we are still broke, broke. I can't figure out how we made it with two car payments and full coverage.
Then the windshields in not one, but TWO of the vehicles are broken. One has glass coverage, but the other doesn't.
The power steering went out in Donnie's work car. Gotta fix that.
The dryer died in the beginning of summer. OK, I'll use the line for the summer and fix it in the fall when we sell our investments. Well, the investments are completely taken up with other major bills.
The roof needs to be replaced, but we can't even see a time in the future when that will happen.
The dishwasher doesn't work right, it runs, but the dishes come out dirtier than they went in. I have literally washed each dish before putting them in there and they came out dirty.
Today, I went in the basement to switch the laundry, and there was smoke in there. The washer is out now. And I use cloth diapers. And I have 7 kids.
The freezer portion of our fridge does not keep ice cream solid, though it does keep meat frozen, so we think that is dying.
And when the power was "accidentally" shut off last week, something happened to our furnace or A/C, because it doesn't work anymore. We have to have a furnace in a couple of months.
So, I MUST fix the washer, dryer, furnace, and the windows in the vehicles. They are not optional. The fridge will eventually force us into doing something, but hopefully will hold out.

I know that this stuff is minor. I mean, it could be really bad, it could be a child hurt, or a death or serious illness. I have the perspective in the right place. But I just don't know how it could get better. The more we work, the more our income grows, the more we pay things off, the worse things are getting.
It is enough to make me wonder if God wants us homeless or something. I know that God wants only the best for us, not to harm us, its not that. Its like, are we missing something and God is letting things go until we get it?
There is nothing we can do to change things, we can't control things breaking down. Budgeting and cutting back, etc, yes, but these things that are hitting us left and right are not things we have any control over.
I need to really pray and seek God's heart and be sure that there isn't something I need to deal with.