I'd absolutely play there....but being only 8 acres it would be difficult to do more than essentially a pitch and putt 9 hole course. Given the theme though it would make a great family friendly 9 hole starter course.
Let's start with the assumption that I have the disposable income to buy this park:
So for half a mill I get 8 acres...
Or I could buy 40 acres for $130k in the Manistee National Forest, with a house already built. I'm not that far from one of the best courses in the country (Flip City), surrounded by other good courses (Mason Co. complex, Leviathan, etc) and have $370k left over to build a course. Hmmmm, gee, which will I do? Probably build up North and try to make it a destination. And yes, I do actually have located a property that matches the above description, and have seen several others that are almost as good a deal. Not that I'm trying to move back to Michigan or anything...
On the other hand, the 8 acres I get for $500k does have buildable land around it, and back up to a small 9 hole golf course, creating the possibility of some sort of tie-in/partnership. Not only that, the property is in the much more populated Irish Hills, and near several small lakes. As someone who has spent the last 30+ summers going to a cottage on a small inland lake in Michigan I can tell you that parents would love the idea of an inexpensive way to keep their kids busy. Putting in a decent 9 hole course and pricing it well could be a great way to "grow the game".
It would never be a course that people bragged about playing like Selah, Idlewild, Flip or Highbridge. But it could be a course that actually made money. I'm thinking of selling 18 holes, complete with your choice of a Z plastic Discraft disc with a customized stamp (Michigan course, Michigan company, and I'd offer very limited number of molds) for $20. Bring the disc back, and each 9 hole replay is $2, or $5 with a hot dog, chips, and soda. No outside food or drink would be allowed, and I'd keep concession prices low. The more I think about it the less I think it would be a huge money maker, but I do think people would play it.