> For instances, I believe Portland, has lower property taxes closer to the city center than the outer boroughs to incentivize people/business to move there.

Unless this was written down in law as guaranteed for a certain number of years, I am not sure I would trust it. In leaner times there will be a lot of pressure on politicians to bring those taxes in parity with other areas; especially if it is a success and property values climb. It's pretty easy to imagine a totally unfair 'pay your fair share' campaign.