I found that many trainer do shows so weekends often a no-no for them. On other side I work weekday with 1+ hour commute one-way, so I did manage to take lessons at nights (it was also 1 hour drive to the barn), but it was very tough on me. My current one while also go to the shows still can accommodate weekends most of the time (knock on wood!
). It's totally normal you can't find instructor, it's often just hard to have same schedule.