Here's a couple of things to consider from my experience in having a brake shop in a prior life:
1) Tools - there are few specialty tools needed to do a proper job, depending on the brake system. Clamps, bleeder wrenches, large lock nut pliers, snap ring pliers, etc. come to mind, especially with a large rear axle assembly.
2) Floor jacks and jacks stands - there is no substitute for the proper equipment to safely raise and support a large brake job. Solid concrete pads are the best, asphalt not so much, and chocks and level are critical. My brother's uncle-in-law killed himself in my brother's driveway with his Class C not supporting it correctly and getting pinned when it fell. Saddest part - my brother had all the safety equipment and the uncle did not use it. Having a helper close by might have saved him.
3) Don't disassemble everything until you understand how it goes back together. Don't take apart both sides of the axle at the same time unless you are totally familiar with how everything works. Use a camera to be sure. Nothing beats having a pattern of reassembly to go by.
4) Don't reuse rubber parts, use new, and if rubber hoses are not supple or are cracked, replace them, and replace them in sets (both front, etc.) Torn caliper boots are a no-no.
5) If disc rotors are discolored or have heat checks on them, replace them. If they have been that hot, the bearings probably need a really good going over or replacement.
6) If you decide to rebuild calipers or brake cylinders, try to flush all the old fluid out with new. And be sure you use the correct brake fluid for you application.
The job is not hard, just time consuming. Don't get in a huge hurry and use the proper wrenches on the fasteners. They will have been hot and tight. Then use the correct torque to tighten them back.
Ask the $1100 to itemize the repairs. I can see a couple hundred dollars of labor but that looks like the upper edge. If there are new rotors, drum turning, and caliper rebuilds in there, maybe not. You can also have a brake inspection and have him point out the issues. We did that for every customer who wanted one and clearly explained the reason and logic for what needed repair. At that price, it's not unreasonable to ask for it.
Just remember that if you are not real sure about what you are doing, there's a lot at stake with the consequences of your mistakes. Use your best judgment and you will be fine.
Everybody does this job their own way, I used to have to do it and guaranty it. I had very few "workmanship" related comebacks. Your mileage may vary! 8)
Those are some of my methods, it's certainly not everything you need to know, and others will have their own experiences to contribute.