BJJ Instructor Dilemma

Just buy your belt from e-bay! Problem solved.

It probably would boil down to whether you want to open up a school
or not. If you want to open a school and you train with a gi then your
school won't be really in competition with "Chris" and if he's open
minded then he won't mind training with you every now and then.

However, If you're not interested in opening a school then keep on
training with him.

Opening a school is not something you should do if you're not 100%
committed to it. Sometimes the best thing to do is to train with those
white and blue belts... that way you can polish all the stuff you've
learned.