I found out from the MERP office in our state (Michigan) that you can use a CMA from a real estate agent to submit to the MERP office in lieu of a paid appraisal from a licensed appraiser. The quotes for appraisals I received were all around $400 - crazy. The CMA from a real estate agent is free - they can't charge, because they're not licensed appraisers.
Just thought I'd toss that out here in case anyone else needs it! :-)