Mine had to be altered a little bit. If you look at the assembly instructions, you will see a picture of the installed brackets. You might see that the car bumper has been trimmed about 1" or 2", to create a 2" square opening in the bumper, or expand a hole that is already there for the air to go into the radiator.
I found mine did not need much trimming, I can recall it needing to be cut about 1" or so out of a already exsisting opening. I tow a 2007 Edge.
I used to tow a 1999 Honda CRV, I can not recall trimming something on that car when I installed the brackets. In the installation instructions, or in the baseplate data, there is a code for how many hours it takes a experianced installer to install one. Mine I think said 4 hours (minimum of 2, maximum is normally less than 7 hours.
This does not include time to install a braking system, or the lights.
For my lights, I have a kit from Camping World, with two diodes, and I installed 4 wires to the car. I tied in one wire to the front running lights, and all came one. I tied in the other 2 wires (4th is a ground) to the left and right brake lights, with the diodes. So each light has one input from the diode, then each diode has 2 inputs, one from the RV turn signal, the other from the car turn signal/brake light.
Fred.