The numbers are widely available online , since most software comes with minimum system requirements. .NET was the only real challenge because Microsoft tries to mislead you into thinking its small by saying the installer is few MBs , BUT, the installer obviously is a web installer and it depends on previous installations of .NET.
Here some links http://stackoverflow.com/questions/21230657/what-is-the-current-full-install-size-of-cygwin https://www.quora.com/What-is-the-size-and-how-long-does-it-take-Visual-Studio-2015-to-download-and-install http://docwiki.embarcadero.com/RADStudio/Seattle/en/Installation_Notes etc For Pharo, Cuis, Lua, Python, Ruby , Gambas and XCODE I have them installed so I can directly verify and confirm these number. I can also switch to my Windows boot to confirm Visual Studio and .NET but I dont have too since I have a rough idea because I installed the Windows boot a week ago and I remember how long the installs took. > >