No, we never have time together - can never afford it time wise and financially
There's the problem right there.
Make the time to something together, anything, even if it's just a walk somewhere. Call in family and friends to babysit.
It doesn't have to be a fancy dinner out every time, just sitting on a bench somewhere quiet can be enough, or a picnic just the two of you or even as a family.
You know you are stuck in a rut. What do you do when something isn't working as well as it should have been? You start again don't you.
Think back to when you were first dating, I doubt that you both went out all of the time and some of the time you have together didn't cost a penny did it? THAT is where you need to go back to, making that connection again.
You can arrange all the weekends you want, but without that connection, that spark, it will be wasted, as you have found out. You are ground down by it all and so is she. It's like being at work 24/7, not getting a break, always having to watch what you say because of the customers... you're always on duty, always on call...do something that makes you both break away from that a few times a month. It doesn't even have to cost anything.
Sort out your finances so you can afford a babysitter, then MAKE the time to make this happen.