I'd start with a small stand and keep it that way.
If we do get to the Prem then we'll be descended upon by the sort of people who wear half-and-half scarves, who come to football for the "experience", and who have bought into the whole "passion" and "drama" thing. When I was a kid, I used to fantasise about Argyle getting to the Prem. But that was before the Prem became so unrelentingly naff.
It's a bit like following a band I suppose - you wish them well and hope that they make enough money to stave off poverty, but you'd be devastated if they made it big, because that would mean sitting down the back of the O2 (or some other soul-destroying "arena") with a load of dribbling cretins baying for the "hits".
We're too cool for the Prem. 17,000? Make it 15,000. Plymouth Argyle - staying small and cliquey forever (hopefully).