who is removing the furniture?
what is the height and condition of the present walls and ceilings and
what's behind it and leaking?
where are you located from the contractor and materials?
when is completion required?
why does this need painting? damage?
how you can figure will be painter and helper at $?/hour from their
house to yours and back to their homes plus you buy all the materials
including repair items and a couple coats of primer and etc and
disposable tools including dropcloths and brushes and rollers and blue
masking tape.