Cheap? Good? Are we talking security of your car? No such thing. It takes a real install about 3-5hours to efficiently hide and route wires. Most installers will just jam the alarm under the dash, tape the wires off and your out in 1 hour to 2. Thats not security. You can reach up,grab the wires and bypass the system in 30 secs. Look at the real options of your alarm. Use the hood and truck switches. Most dont arm the hood, then it gets opened and they disconnect the siren before it goes off. Viper is the best out there. DEI owns Clifford and Avital. They are the leaders period! Its security,you get what you pay for.
Good luck