Getting Closer to Doctoral Program

I have become interested in a PhD program through Western Michigan University in Interdisciplinary Health Studies. It allows nine hours of electives and these can be met through DL coursework as long as they are grad hours and the other school is RA.

I have two possibilities as interest areas:
1. Rehab counseling
2. Consulting courses with an OD focus

WMU's tuition right now is about $ 280 per grad hour and I would like to stay near that or under.

Welcome ideas and feedback.