Subdivision of raw material (land parcel)

Hi all,

I am trying to setup ERPNext for a real estate company that buys large parcels of lands, subdivides the land into 50x100ft plots (eighth of an acre) then sell of the plots to their customers.

I have the parcel of land (in acres) as raw material and I am now trying to create a BOM that will split the parcel into a given number of plots (created an operation called parcel subdivision) and add the plots into a warehouse available for sell. But I am unable to save this BOM

Is this the correct way to go about it? Any thoughts on how I should handle this?