That sounds the best/easiest option so far.
It’s almost as if you live there, and know what you’re doing.
Luckily for me, I don’t need to use peage much, maybe a few times per annum but it would help negotiate the tolls and hopefully reduce the cost. I prefer using the lovely twisty under used minor roads which often pass through some beautiful villages, unless of course I need to travel a long distance quickly, then peage it is.