Originally Posted by Starter
Your premise is deeply flawed.
NJMP, and other permanent circuits, definitely cost more to build. (I do wonder where you got the 150 million figure.) They have a substantially greater pay back though. They are used, that is to say rented, almost every weekend of the year for many racing activities, grassroots motorsport of all types being very alive and well. Both circuits running at the same time many weekends. There is much use during the week for all kinds of activities. The note itself is amoritized over at least twenty years. And last, but not least, the land and facilities have substantial value themselves so that there is still great residual value.
None of the things I mentioned apply to street courses which have to make the entire years income in three days. Apples and oranges for sure.