Supervision by a nurse. It's usually contracted out.
> $6000 would buy me enough Special K for several life times ...
If it's not the same procedure (IV) with a compound that is pure you might not be getting any of the benefits.
This would likely last much shorter then an infusion as there's a limited options for setting a running IV as opposed to just a single injection.
And there shouldn't be a difference between animal and human ketamine.
"In the village of Boshe, underground laboratories are producing ketamine cheaply in large amounts." from:
http://www.bbc.com/news/av/world-asia-china-33472971/inside-...
I also wouldn't be trusting the packaging wasn't fake (or refilled).
They'd more likely produce the powder as that's easier to conceal for shipping or more likely just make DCK which is still legal.
At the same time since insurance doesn't cover this the only real option for people who don't have that kind of money (myself included) is black market self-administration or more traditional therapies which may not be as effective.
It's not proven. There are a few articles and a few success stories. It isn't a panacea. The cost is only an issue after someone has tried many traditional therapies.