Nigel this is certainly not shining the true light on this subject.  Revenues are one thing but not seeing where you talk about city expenditures.  Remember that turf that had to be replaced to the tune of several million less than two years ago.     We, the taxpayers will be paying for this turf until 2035---betting it will need to be replaced several more times over the next 20 years.  This is but one small yearly cost on the part of the city. The city is not sitting back collecting rents and not paying back out.  You do all of us a disservice with this small little article.
http://www.oregonlive.com/portland/index.ssf/2014/03/portland_timbers_and_city_rene.html