Are most CFIs part time or full time? How many hours are you getting a month?

A new CFI/CFII at a local flying club is accumulating 20-25 hours per month while maintaining a corporate job, instructing during early morning and evening sessions when students with full-time employment are available. With over 15 CFIs competing for flight hours at the club, reaching the 1500-hour requirement for career advancement will require extended time.