Always have a number of blank rows

[Chuckarou]

Hi, I would like to always keep a defined number of blank rows in a specific column of a table. If there are less blank rows then specified, I want the code to add rows to the entire table (and auto complete all the columns) until the number of blank rows is reached. I need this as it is a hidden table that drives other formulas. This type of code is way above my skills level.
Thanks!