I have travelled over 400K miles in the last 20 years in my motorhomes. I have had six of them total so far. I will say that it would be hard to make a living doing landscape photos as most of the stock sites pay barely anything. (Read that as cents not dollars a use.) I too believe that the landscape guys earn money on courses and presets and Utube. It is harder now to get a Tube channel running and making money. I have been published three times this month on portraits but the amount of money is pretty low and you can not live on it.