Dear Namrata,
Whether to provide PMS consulting services or otherwise, one should be clear about how much to charge. Generally these questions are not asked on the public forum as you will never get true replies.
It appears that you are not thorough with the PMS Consulting services. Therefore, would you like to outsource these services to me? Rough speaking it will require 6-7 days to establish comprehensive PMS. If you wish to know more about PMS, then you may click the following video
uploaded on Youtube:
What is Performance Management System (PMS)
If you wish to know more about KPI, KRA and the essence of PMS then you may check my following reply:
https://www.citehr.com/526357-kpi-kra.html
Thanks,
Dinesh Divekar