It’s frustrating that an assessment is so expensive. And the psychologist will probably only get reimbursed for 4hrs of testing so your report will be short and cursory anyway… I’ll avoid going on a long angry insurance rant here.
Do you have any Universities near you? See if they have graduate psychology programs. Those students need people to practice giving assessments to and are supervised well. They usually give assessments for very cheap because it’s a training program.