For my Jeep TJ, Blue Ox towbar & baseplate, Invisibrake, diode brake light wiring... took me 3+ days DIY, but I'm a perfectionist. Parts cost under $1,800. My labor only cost me a few scrapes and busted knuckles.
I can see why a reputable shop would charge $2,000 for installation labor. First, it's time consuming... if done CORRECTLY. Secondly, there is a liability issue.
I had my son help me with the grunt work, like holding the baseplate while drilling holes. The rest is not physically demanding. But you should have decent mechanical skill, and understand 12 volt auto electrical systems.
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