Many of us have both power windows and either "'door poppers" or door locks in their rides. A number of aftermarket companies sell different styles of hoses or conduits to get power and control voltages to the doors. They will require drilling a hole in both the a pillar and door face. The question one needs to address early on is how to get in the car in case of battery failure. Depending on what type of ride you drive, it can be a problem.

Six volt guy living in a twelve volt world