om sai ram,
I feel u can do u start from mumbai - gokarn (mahabaleshwar) and then to shirdi as it closer to mumbai...avoid going on thursday and sunday.but its very hot there....now temp is 42. best is on monday/tuesday/wednesday where there will be less crowd.we were there in shirdi for 2 days tuesday/wed'day.baba is there also to guide u.don't worry