Cleaning to save space after building from source

Hello everyone,

I downloaded today UE4.23.1 source code and I compiled it in order to put my hands on the new Chaos plugins. After building the engine I realized that the whole build takes up nearly 90GBs. Unfortunately I only have a 500GB SSD and all the space I can save I must save. I’ve been reading around searching what could I do to drastically reduce the folder’s size but I found no certain informations. I’ve been reading that is possible to delete the Source and Intermediate folders, but as I stated before no one gave a clear go ahead. So, once and for all, is it possible to safely remove those folders without messing completely with the engine’s functionalities?

Any clue and help will be appreciated, thanks in advance, have a lovely day.