Hi, i have read your project description, i understand what you want, and i would like to offer you my services. I have excellent knowledge of all required technologies (Wordpress, PHP&MySQL, HTML&CSS, JS, Google and other maps API) and lots of experience with them, most importantly including exprience with creating custom complex Wordpress plug-ins, so i can finish this project without any errors. I would deliver user friendly Wordpress plug-in for managing your clients and their location + front-end output of the map with pins and detailed information about the clients available after clicking the pin. Feel free to contact me by private message to discuss the details or to get started. I'm looking forward to our cooperation.