According to my Nichols' Chilton Labor Guide, a master cylinder replacement for your vehicle (including system bleeding) is estimated at 1.6 hours (1.2 if other brake system work is performed). A qoute of 0.6 hours (36 minutes) is, in my opinion as a mechanic "overly optimistic". When I had my business, I used the Nichols' Chilton Labor Guide exclusively (the numbers were the closest to real world situations), but the books the other guys use vary by location.
As for your existing mechanic, ask him what he uses, and if he's 'straight up', he'll tell you without hesitation.
You can get a copy of Nichols Chilton labor guide through the Chilton website (www.chiltonsonline.com) or through various retailers (I typically picked mine up through JCWhitney (www.jcwhitney.com)
The corrupt reputation of auto repair is one of the things I never liked about the business. So, I started a mobile auto repair business with a honest approach, going to the customer, which would save me a lot of overhead costs. Well, between being an honest businessman, and trying to start a business that operates outside in what turned out to be my areas wettest year in history, it tanked. Lost thousands of dollars, but the fact that every customer I had absolutely adored the fact that I would go to them, and shocked by the low price, kinda makes it all worth it in the end.
As for if I recommend this website as a nice place to work, I'll tell you what I tell others about it..... you won't get rich, but it's nice to help those that need it. Don't get me wrong, there is money to be made, but I enjoy it more for the way it exercises my "chops" or "skills". As for getting the job, you just apply and indicate what type of expert you want to try out for, then answer some questions and other experts evaluate your performance and if they feel you answered the questions professionally, the job is yours. You can branch out to other areas if you so desire as well to keep things interesting.
I'll be sure to check out the 2 web addresses you sent. Have a good one, and maybe I'll see you in the "experts lounge".