Jason, I think your landscapes are quite good. However, I think you set your Kickstarter goal unrealistically high.
I've seen projects from photographers whom I would regard as being equal or better to yourself fail to attain goals that were a fraction of yours.
I realize that publishing a 300-page book is an expensive proposition and in order to achieve the economies of scale needed to keep the price reasonable you probably had to set the goal high.
I just don't think that Kickstarter was an appropriate means to fund your project. I would have been more inclined to shop it around to art book publishers to see if any would be willing to partner with you for the cost of publication.