I started using KaniWani as a suplement to Wanikani and so far, I really like it!
However, I do find some bugs and other small annoyances in Kaniwani from time to time. Is there any forum to report bugs and such?
The creators of KaniWani usually respond to issues posted in this thread:
Like Pimsleur, you may be able to find the graded readers in a library if there is sufficient interest in Japanese in your part of the world, or if you are lucky enough to live near a Japanese Cultural centre they may have this sort of thing available as well.
I am also in a regional area with lots of cows, which is why the readers went on my Christmas wish list 
Seems like Tae Kim is quoted a lot! To me, I heard of Tae Kim and used his guide for Korean a bit, and read a bit of his Japanese guide. But Imabi is very good too, recommended a lot on reddit, and there is a lot of content, ranging from complete beginner to veteran. The guy who maintains it is genuinely interesting in Japanese and you can contact him for any question you have. Give it a try, and it’s free!