Car audio

My car audio system was recently upgraded with new head unit, 5 channel amp, tweeters, and subs.. I need two more things done to finish it. (1) rewire and reground battery/amp, or otherwise diagnose and fix problem of engine noise coming through speakers. (2) swap out the four original door speakers and install/mount new ones in their place (I already have them and will provide them for you.

What would be your estimate for both?