Ah yes, my parents have one of those. The minutes run while you dial, and while the phone is ringing...so be carefull as to what you get.
Oh yeah, i ahve drop clothes and tarps, you MUST use those.
Outside is fine to paint. You should have your parents invest in a WAGNER spray gun. It cuts the time down more than half. ANd it you will use less than half the paint.
Stay clear of the windows and doors if you get a spray gun. Once you have practice, you can trim with a gun, but till then, brush and roll around the openings. You can get a small spray gun for around 50 bucks, and you will save more than thnat on paint.