Stocking question

[proudnewbie]

Hey Folks,

So I'm plugging away at stocking my 65 gallon, and keep coming back to the all important stocking questions. There does not appear to be a clear or concise rule to follow.
So that brought me to a few questions.
How do you guys determine your stocking limit. Do you include your inverts or CUC? Do you include the volume of your sump or refugium.

Also just a random thought..... if you had tankmates with no territory and a massive amount of macro and live rock could you stock say 30 fish in a 50 gallon if you had a 200 gallon sump.