I'm not sure where you are located, but Freestyle sells their Arista lith developer very inexpensively. It isn't my favorite if I want a colorful result, but it does work well. The one caution is that the Arista has formaldehyde while the Moersch and Rollei/Maco do not. Personally, I'd recommend buying a commercial product first so you know what a good lith print looks like before going with homebrews. It will be hard for you to judge the homebrews otherwise