Actually, if you know what you're doing, it's very easy and only requires 3 tools: 1 flat head, 1 phillips, 1 10mm ratchet.
As for time, it's hard to say since I was multi-tasking, taking a break, watching the Bears game(boo), eating, etc. Hey, it was a Sunday so a day for relaxing. haha.
But I figure around 3 hours max. Maybe 4 hours for the avg guy that is doing it for the first time.