For point 2 - if you buy the kindle book first, you can add the audio book for a comparable price (not universally available, but it's still pretty broad). In fact, this kinda takes care of points 1 and 3 too, since there's no subscription needed, and the audio book is directly tied to the kindle book in the reader.

I just wish audio books were cheaper. I understand the price - voice acting and audio mixing - but it's still in the realm of too expensive for a few hours of one-shot entertainment.