i cant really answer that question cause ive nvr had private lessons, but from what i hear from ppl who do have lessons is that their teachers rnt patient and the student gets frustrated and doesnt feel like practicin nemore. so i guess ppl look for pateint teachers and teachers that actually wanna be there and rnt just doin it for a job, but cause they like music an wanna teach it and will be able to put up with their students.
good luck on ur store/studio, maybe ill get lessons there one day