I used to do credit card touring. Now that I'm 70, I have an ebike, and I have been dreaming about touring.
My take is you will want 2 batteries. Most days you will be fine with one battery, but you know Murphys law. You don't want to be going uphill and into a headwind late in the day.. with a dead battery.
It's going to be real easy to forget to charge the second one after a long day.
In my distinctly unhumble opinion, throw out your list and start over. You need a motor, do you really need the rest? An IGH that might take the strain is going to set you back about a grand, and for what? Credit card touring means your bikes will be a lot lighter, and you know you will be able to recharge the batteries.
I would guess you need a medium strong motor. I'd say 500 or 600 watts, but Bosch is what you want and they've gone over to Newton-meters. Just avoid the wimpier ones and you'll be fine.
https://www.gazellebikes.com/en-us/g...5D=237%2C9%2C9