Are you kidding me, you named yourself after Ketamine but you've never experienced a K hole? Don't get me wrong, low dose Ketamine is great fun, but a K hole blows it away 1000x over, a K hole is one of the strangest and most euphoric drug experiences that exists. It is really crazy, but I think, so long as you want to experience it, you are ready. Just ensure you do it at home in bed, since you won't want to move around for the duration of it.
I didn't read through all the thread but someone mentioned not doing IV, I agree completely, this really is unsafe - not due to respiratory problems, but simply because you will hole too fast and chances are you won't be able to get the needle out of your arm - in a hole you literally leave the world behind completely, the needle most likely won't exist in the new world, and you'll have a big hole/needle in your arm when you come out of it an hour later. Not a very nice thing to happen. IM on the other hand would work well, but nasal works fine so if you're not used to/comfortable with needles, you'll need a bigger dose, but it'll work well, I'd recommend 250-300mg for a sure-fire K hole with no tolerance, if you have tolerance, give it a couple months (I know, it's long, but that's life) break, then take 300mg.