MIke,
This is probably an oversimplification, but I've always figured this to be an accounting issue.
1) What are your total costs to run the course. Note on the loan, salaries, equipment, materials, utilities, maintenance costs, etc
vs
2) How much revenue can you demand from the market in green fees and services otherwise.
This is where older courses have a huge advantage IMO, if they own the course/land outright.