Good info here. I second the comment about having your ducks in a row. To the point of having a sheet written up with exactly what you want. Be very specific about the wire type to be used since offen when you say 'two lines' they will try and use quad cable that is 2 hots that share the same netural and ground...which is not really the same thing as two seperate lines. Also compared to the labor costs materials are nothing. I would go for at least two lines into a box with 4 outlets both wired on the same phase and if possible on the opposite phase of stuff like AC and kitchen circuits as mentioned above.
Good luck
Good luck