Jooles, be happy you're able to live in France! That's worth a lot on its own.
I think that you can lead yourself astray if you depend too strongly on other photographers' routes to success. Remember: two of your heroes started way before the coming of digital; they had a lot of book work to support part of their businesses; they were living (at the start) in much more buoyant economic times. They might not have felt that, but the ambience was, in general, healthy, a far cry from today. Michael Bouselle (should that be Bousselle? - can't remember) was also big into books and stock, and a wonderful lensman to boot. He had a magnificent eye for landscape and detail; particularly, I thought, tight detail.
I'm certainly not suggesting you don't try, I'm just advising you look for all the added strings to your bow that you can conjour up! In my own world, girls, I had to get out of fashion after many years and into calendar design and production to continue with my own photography and to start making real money. And, in my case, it wasn't an easy genre/option for most amateurs to ape: they could neither afford nor get the right girls. Landscape, unfortunately, is wide open to the world and its rotten little brother to exploit and gift away on the payment of a sop to pride.
Good luck: you'll need it, as we all do.