My boot drive (Windows 10) is a 64GB partition of a 500GB NVMe drive and with Windows, Cakewalk (and 32 bit version of SONAR and Project5!!!), a bunch of plugins, VEGAS, Sound Forge and Office installed, there's still ~36GB free space. So 250GB is plenty of space to install a bunch of applications and plugins (given that most plugins with large libraries allow installation elsewhere).
The largest disk space gobbler is probably the Windows update folder, which can be periodically cleaned when updates have been installed (C:\Windows\SoftwareDistribution\Download).