Cost to paint?

Question

I need the interior of a house repainted. Looking for the price a contractor would charge to do this (including paint)
1. The house will be vacant, no furniture
2. Ceilings, walls and trim (including basic crown)
3. New drywall in all rooms and on ceilings (renovation)
4. 4 small bedrooms, 2 full baths, 1 half bath, avg living room, avg dining room, small office, two average hallways and a small foyer
5. Square footage of all areas totals 2500.

Answer 1

Paint all Sheetrock walls and ceilings with two coats latex flat wall paint , prep work between coats .
Paint all trim (windows and casings , doors and casings , crown molding , base molding ) with one coat oil base primer and finish with two coats (my preference) oil base semi-gloss enamel.
Base price $6000.00

Answer 2

4oo square ft per gallon of surface(maybe 8 or 9 for the walls per coat primer, plus 2 top coats so roughly 27 gallons for the walls. and 15 for the ceiling minimum....so 42 gallons of paint assuming all surfaces are smooth. That is a roll on finish.
look at a week of time allowing for drying tween coats. You figure it.

Answer 3

figure a dollar and 25 cents per square foot plus material, total = $3500