Need suggestions in starting my own appliance repair business

I am a technician for about 5 years now and became master technician a year ago. I am also EPA certified and have worked with major appliance repair company who specialize working on high end appliances like subzero, thermador. I feel like i have good experience but not making enough money for myself( 4-5k/month) My biggest concern is how to get calls.
I understand real money is in high end appliances but dont mind starting on low end too as long as i can get few calls a week.

Please share your experience and advice is appreciated.