Editable grid for Each raw of read-only grid

just a suggestion -> 
you can make a selectable read only grid and restrict the selection to  only 1 after selecting a row a editable grid should be displayed for configuration and user can configure it and can go back to edit only grid by a button or rich text , you can do this by playing with show when. 

What's your use case?  The setup suggested already by AMAN is the one I usually prefer myself also.