Painting a House

• Interior paint job costs around $3/sf without ceiling or trim, and $5/sf with ceiling and trim. Seems like around $4/sf avg for whole house [1]. But this seems to be re-painting, thus higher for new paint?
• Paint lasts up to 400 sf/gal [2]
• You need 2+ coats starting from scratch.
• You need primer for raw wood, 2-in-1 paint/primer is for stuff that has been painted already.
• Bob Vila says similar.