Hi Jose,
If you want to use a Model then, I can't think of any option other than what Luke has suggested. If you can export your model as a script then, possibly you can attempt below.
- Create an environment variable pointing to a txt file, containing your feature class variable parameters.
- Get the environment variable in your python script and read through the file to create a dictionary of values.
- Use the variables in the dictionary as input for your processes.
Attached script reads a variable file.
Below was the content of my variable file.
var1||something
var2||C:\tempdelete\PL_TO_LINE.gdb\PL\CONSOLIDATED
var1||override