Gurezaemon:
Scaffolding - I painted my house 3 summers ago during a quiet patch at work. I looked into renting scaffolding, but was horrified by the price.
I ended up getting one of these, which despite the cost, worked out dramatically cheaper than renting. It also meant I didn't have to rush to get the scaffolding back, and could spread the whole job over a couple of months.
I would use that type of thing if I could but my place has steep sloping ground, and for the front, it slopes in two directions. It's also pushing 3 stories high and has raised gardens and other obstacles.
An acquaintance bought a whole lot of timber and built a scaffold, anchoring it to the house with big screws. Also, I've got to get up to the peak which is pretty high above ground so I'm going to pay the professionals so I don't have to worry about that.
I got a scaffolding quote for $2k + $100/week.

