Unless you are shooting big time, all the time, with a full commitment to make a living out of landscape photography, it will probably be more sensible pricewise to shoot film, especially if you develop it yourself, which is a hassle but can be done very well. BW is almost a must to be developed by oneself.
And don't underestimate the cost of electronic archiving. Film technology is pretty unbeatable in this aspect. That will go into the economic equation as well. We are really blinded by all those shiny mirrors that are being waved in our faces these last decades, but we underestimate the value of simple technologies as paper itself. The aspects of image permanence in its electronic form and the costs in money and effort to keep your images thru your lifetime are the weak points of digital photography. Analog technologies are way better in this regard.