Sleep Apnea Treatment

I have sleep apnea and I was wondering if there are ways to cure/treat it without anything drastic like surgery or expensive machinery. Help please!

The guy I work for is 90 years old, his family doesnt want to “waste” the extra cash on him for the tests ect. He’s definately got sleep apnea ive seen it before. will Vervain help? any other natural treatments i can pay for outta my own pocket for him?