Assume is not too big a site and customer makes no strange requests.
Experienced person: 1 day CM, 1/2 day CME, 2 hrs CUE, 2 Hrs SRST. The latter actually takes longer because it must be fully tested and usually that can be done only at funny hours, else users will think what is just installed is broken already.
Unexperienced: whatever it takes and good luck.