I have the process worked out to my satisfaction, but it's never possible to put a realistic time on it from start to finish, given the way I brew. I have the preheat water in my mash tun between 0530 and 0600, but then I go into town, and don't start mashing until about 0800.....since I'm generally done by noon, even with a 90 min. boil and cleanup, I suppose it's more realistic to say about 4 hours. And, no, it's not work. I'm retired; I don't do that.
Retirement: "Best job I've ever had."