This is offered without judgement, condescension or condemnation. Please take it in a spirit of honest care for a stranger asking for help.
I don’t think I need to tell you that your prior level of consumption would be considered a drinking problem.
I probably don’t need to tell you that you know the answer to “can you get wasted just one time,” but just in case I do, I don’t think that you can get wasted just one time. Forget the ketosis and fat burning. I suspect that you are not capable of stopping at one session. When the single session becomes a monthly and then a weekly and then a daily, then what concern will ketosis hold for you?
You can get wasted. But you will probably waste the previous two months of sobriety. For what? What value will getting drunk produce for you? If it’s a reward for success, you should find less destructive rewards. If it’s a release from cares, I’d recommend other avenues.