Persistent disks proposal

A stake in the ground ... something to evolve into a working implementation.
I also can imagine a case for < 1GB in private cloud - even if AWS and GCE start at 1 GB - but I guess I also feel like the code is simpler managing just a single field.  You may want to look at https://gowalker.org/github.com/dustin/go-humanize which gives sample parsers to convert 83 MB into an internal form.