Is there an expert in making cheap alternatives to cell culture media ? advice needed

hello guys
i am attempting to make a very basic and frugal cell culture media for mammal cell culture, is there an alternative to FBS, ABS that is cheaper and available
so far i found that egg extract and yeast extract and coconut water is giving good results, but is there a tested alternative that also can be used for stem cells??

#cell_culture
#cells
#cell_culture_media