Having owned the 430EX II in the past, I'd like to disagree with you that these $250 flashes are better than the YN $45 options just because they have e-TTL. e-TTL is great for on-camera and if you trigger with Radio Poppers or Pocket Wizards, but since OP wanted an affordable off-camera lighting kit that doesn't quite work. We're talking at least a $750-800 investment there and it doesn't do what the OP wants.
Right, I wasn't suggesting ETTL for the off-camera setup, sorry if I was unclear.
If you ONLY want off-camera lighting, then a set of three fully-manual YN-560s is fine. For me, the 430EXII does double duty: off-camera in manual mode for studio or other multi-flash work; and on-camera ETTL for when I'm NOT doing studio work, just doing walkabout snapshots and such.
Also, the 430EX II is not an optical slave. So I'm not really sure how you're getting away with triggering that, but last I checked this was not possible with the 430EX II. Which means OP would also have to buy a Master slave, which is another added expense which now brings this kit cost up to about $1,000.
I put the trigger on the camera, the receiver on the 430EXII (which is in manual mode, not ETTL mode), and the Yongnuos are set to optical slave. The 430EXII doesn't have to be the main light in order to trigger the other flashes in this manner. If I'm doing a three-light setup, the 430EXII will be the hair or rim light, so (lack of) power isn't an issue.
I haven't personally used the YN-565, though it may be a perfectly fine choice for on-camera ETTL.