[Rails] Reducing redundant columns in tables?

Consider the following scaffold for a virtual machine manager.

rails g scaffold virtualmachine total_memory:integer
total_disk:integer
rails g scaffold plan title:string price_usd:integer
max_memory:integer max_disk:integer

Now this is greatly simplified however I have around 30 values that I
want to track for each virtual machine and for the plans as well.
What would be the best way to do this?

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