Linux Distribution Customization

I have tested a Linux distribution that works well with my dedicated hardware. It is a very lightweight Ubuntu distro using LXDE. The hardware currently boots the image from micro sd card as a live OS. I need to be able to flash the OS onto the internal drive of several systems and then set up a unique computer names on each system. I also need a bunch of tweaks done to clean up, brand and 'lock down' the system. The system will only do one thing: launch Chromium browser fullscreen to a specific url. Here is a list of general customizations that I need done to the OS: 1. Add a graphic that serves as the background of the boot loader, login screen and desktop 2. Remove all unwanted/un-needed packages. I only need Chromium browser and basic OS administration like wifi setup. 3. Login control that, unless interrupted by keyboard input, automatically logins a public user and launches Chromium fullscreen (more details on public vs admin login below) 4. Roll all of these changes into a new distro image that can be used to flash the internal memory of several (identical) devices. 5. An easy method (either during image install or after admin login) to set a unique computer name and unique url for Chromium to open to. Admin user specific: 1. Keyboard input at login screen stops automatic login of public user and displays normal login/password input for admin. Login launches normal LXDE desktop with full admin rights Public user specific: 1. Automatic login to system. I would prefer there be no desktop at all since there is no user interaction and Chromium launches full screen to a specific URL. Is it possible to launch without a window manager? This is a proof of concept project. If all goes according to plan I would like to pursue the idea of a custom shell/desktop in C++ or Python in a new project. That is why I included those skills in this project. They are probably not needed for this phase of the project but I would like to find someone good and reliable who I can continue working with as I build this project out.