I'm just wondering why you feel the need to paint the exterior of a new house.
Once you decide to paint it , it is something you'll have to do every few years( I'm in this position) and paint is something that appears to have become more expensive. Although if you do decide to do the job, I would recommend using good quality paint such as dulux weathershield( it will last longer in the end). It is the sort of job that will take a few days to do properly and you would be as well to wait for a few guaranteed (???) dry days in the summer if it ever arrives.
And remember, using ladders can be dangerous: More people are killed or injured using ladders than any other piece of DIY equipment, with more than 30,000 needing hospital treatment each year in the UK. So be careful up there!