Business plan vs regular

Have had a business account with magenta plan with 3 lines for over 5 years with Netflix premium i was paying 167ish with autopay. With new plan migration to business unlimited advantage 2l Ti, same set up I'm paying 187ish. Is there anything i can do with business or making a new regular account to get a cheaper bill? All i care about is unlimited data without being throttled down when congested or high usage. May be adding a 4th line but not fully sure yet. I buy new phones direct to avoid carrier bloateware so idc about upgrade benefits either. Any suggestions help.