In addition to Chad's excellent comments, please note the CPM designation is through an internationally recognized professional association, IREM (an NAR affiliate), whereas the CCRM is California based (although provided by CAA, a NAA affiliate).
The CPM designation is considered the gold-standard in property management. For your residential site managers, you may also be interested in IREM's ARM designation as well. You may find more information at
bit.ly/bqYa4s
. Note IREM offers private offerings of their public courses to firms that can be customized. Please feel free to contact me if you have further questions (I currently serve as IREM's Region 3 Education Chair).
Most importantly, as you already know as an ASTD designate, formal training and credentialing of your people WILL set your firm apart. With an executive CPM in place, your company can also earn the coveted AMO designation through IREM. Go for it!