There are various ways. Some of them so obvious you should have thought about them.

• Talk to your bank. Serously. Talking often helps. I run a smallish IT business. I live in Poland (PLN), my customers may me in EUR. I have a separate EUR account (as you could have a separate CHF account even with a german bank). I can change small amounts as you - using the official daily rate etc. I can change LARGE amounts (10k EUR wise) through their Forex trading desk for fees that are LOW. And 9k actually is something you could also do with some savings - just save up CHF for a couple of months. And "your bank" mean maintaining a bank account in Switzerland. Nothing wrong with that, you know.
• Use a service like Transferwise, Oanda etc. who have significantly lower fees for money conversions. Transfer fees themselves are very low in the SEPA area - but it may be worth having a local swiss account for that.

There are various ways, some of which are so obvious that you should have thought of them.

• Talking to your bank often helps. I run a smallish IT business. I live in Poland (PLN). My customers may be in EUR. I have a separate EUR account (as you could have a separate CHF account even with a German bank). I can change small amounts, using the official daily rate etc. I can change large amounts (10k EUR) through their Forex trading desk for fees that are low. 9k actually is something you could also do with some savings - just save up CHF for a couple of months. And "your bank" means maintaining a bank account in Switzerland. There's nothing wrong with that.
• Use a service like Transferwise, Oanda etc. who have significantly lower fees for money conversions. Transfer fees are very low in the SEPA area but it may be worth having a local Swiss account for that.