Are you about to hire a private investigator los angeles ca? What are the things that you need to remember when you are in the situation of hiring a P.I? The number one thing that you should remember is, do not focus on the cost of the service. Once you decide to hire a private investigator, you need to be ready with the service payment. Yes it is going to be huge especially if you choose to hire an expert private investigator. Too many clients call and immediately ask what the cost is to hire a private investigator. That is wrong. Try to determine your budget first.