Option 1 is way cheaper.
A 1800 head cost is like $2, an MP cost is like $7, that is per head.
Supporting hardware would be the same in all case, BUT it wold not change bottomline much, as the biggest factor is labor.
All these pvc pipes and heads is like $250 for 1000 sq ft lawn, labor quote would be measured in thousands in CA.
I’d do MP rotors anyway.
Check if your water company has a rebate on water efficient nozzels.