Kevin,
I think you're ignoring a critical factor when it comes to price.
The seasonal nature of the pricing model.
Do people from all over the country flock to the course you referenced in Ohio in the summer ?
People from New England, the Midwest and Europe come to Florida in the Winter.
Some stay a few days, some a week, some a month, some for the season, thus driving up the cost.
If you played those same courses in June, July and August, the pricing would be radically different.
So, you can't view price in a vacuum, you have to understand the tremendous seasonal influx of golfers, demand and pricing.
Golf in southern Florida moved, like residential communities, from the coast inland.
Development moved inland because land was cheaper, not more expensive, hence, many new courses are offset from the coastline.
As to the cost to build a golf course in south Florida, I don't imagine that it's substantively more or less than anywhere else, absent unique permiting and site issues.