It’s a good idea to make groups of computer that are identical in hardware (if there are), because you can do an unattended installation using kickstart
Another consideration is to review all the machines searching for chipsets for video and network mainly and download the drivers before the installation begins. With video and network working good you can search for the rest of drivers using the internet in every machine.
Also consider another distribution of Linux, due your reduced hardware capabilities, maybe a Ubuntu version can run better, because it uses XFCE, a lightweight desktop manager.
Tell us more about the purpose for these computers, something like what you will do with they. The are for kids learning? offimatic work? researching?