If you keep up a level of use that is having you come here and asking "is this level of us okay ???", then chances are that - even if you're okay - you're ketamine trips are going to start to become boring soon.
Here's my advice. Even though ketamine is super awesome and you want to do it all the time, put the breaks on sometimes, and just let your cravings for it grow and grow, until when you DO buy it next time, it'll be super awesome, and really strong, and your trips will still be full of novelty and you'll save a bunch of money to boot !
That's how I feel about my own use anyways. I looooove ketamine. LOVE the stuff. But after it was no longer "new" to me anymore, I decided to limit ketamine use to "special" occaisions. I usually just buy 1g-2g's a couple times a year, and try to using it when I'm doing other drugs, like LSD or MDMA, or coming down from this or that RC or something.
I think the best way to use ketamine, is to use a "bunch" of it in a small amount of time, and then take a long extended break.
I reallllllllllllllllllllllly want to get my hands on some methoxetamine though, mmmmmmmmmmm mmmmmmmm.