Car with no door handles ?
The electrical part of doing this is a breeze, just takes time and patience. Unless you are scared of wiring, in which case you should find a good auto electric shop. You can wire almost any quality alarm system to do this, and the unlocking solenoids can be purchased anywhere that sells car alarm systems. As for shaving the handles, if you like body work and getting bondo on your hands, it is relatively simple also. Or you could hire a body shop to take care of that part.