Believe it or not...
...I went into Autozone on Valentine's Day to buy a fan belt. On the closeout shelf was a remote starter/alarm/keyless entry setup for $80.......
Boy was I scared when I gave it to my wife instead of a dozen roses....
Hey! She LOVED IT!
Now I've got to install it....
Read the instructions and as long as you have a working knowledge of how a car is wired you should be able to do it. Audio systems make a good learning experience. If you are able to follow the instructions for installing a radio, I'd guess you should do ok on this type of installation.
Make sure that the brand you buy has a website with specific wiring diagrams for different models ....I bought a
DesignTech Model20927.
$80 at Autozone...even comes with an installation video.