Hello Saurabh,
Prima facie this looks a simple case involving 5 Maintenance Plans , one for each Equipment. Cycle/unit 183 D with differentStart of Cycle dates and Scheduling Indicator as Time. All these plans will be having your same Tasklist. In this setup the plans will be triggering at different dates for different equipments on the day of Start of Cycle Date + 183 Days.
Is this the requirement?
KJogeswaraRao