It took me the better part of a day to run the amp wiring (PWR, Remote, RCA's, Bass Controler) in my ride cause instead of trying the short route of removing some door trim I removed the passenger seat and entire rear seats, then lifted the carpet, ran the wiring right up the center, all nice and hidden. When I did the remote start, it also took almost the entire day cause I looked for the the best route then took my time running all the wiring, used a sh1t ton of zip strips. Made sure that when you sit in my car there are no visible wires and nothing dangling on your feet. Running wire is something that takes practice and patience, but it's not that hard. If you do short cuts they will come back to bite you in the a$$.
