Advice for Advanced to Expert lessons

I'm trying to figure out a way to get lessons to help my technique improved from the advanced level to an expert level. I'm capable of going up to a groomed black but the technique will break down at times depending on the snow conditions.

The only way that I found is to get private lessons to help out but that's prohibitively expensive. I live in Washington state and the cost of private lessons ($400-$500) don't really lend to taking the the amount I'd need to make the progress I want.

Are there any other ways people have successfully found to progress or am I just hopelessly stuck unless I drop thousands on private lessons? I'm open to flying somewhere and doing an intensive week if that's an option but haven't found anything.

Thank you in advance!