• One room or the whole house? Applying one coat in one room is a reasonable DIY Saturday project (especially if you have help and beer). Multiply the time spent moving furniture, prepping walls and sanding old trim by the number of rooms in the house, and you might want to hire real help. It's the same outside. You can probably tackle one shady garage wall that needs a little scraping and sanding plus a coat of paint, but covering all surfaces of the house is usually best left to a pro. 

The best time to tackle windows is in the beginning of the day, when you're fresh," says Doherty. "But it still takes me an hour to do a standard window." For double-hungs, begin by raising the inner sash and lowering the outer sash until their positions are almost reversed. Paint the lower half of the outer sash first, then the entire inner sash. Once the lower sash is dry, return both to their normal position, but leave them slightly open. Finish painting the outer sash. "Windows take too long to tape," says Doherty. When painting, overlap the glass by 1/16 inch to seal the wood.
I am in northern Nevada and you have not yet gotten sufficient responses to provide a painting cost chart showing the averages.  I do have a quote from an outside (Not Homeadvisor referral) painter who is local for $2,750 for soffits, patio cover and posts, Garage facia (redwood clapboard above (~300 ? Sq. Ft.) on a 2046 Sq. Ft. home where the walls are 9 ft tall and it is fully stuccoed with plastic stucco surfaces, so not being painted.  

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