> anonymous tip line
Run by Airbnb? Seems reasonable.
The answer, as with all govtech, is “a lot more than it should be.” Governments, especially local governments, have no internal technology competence, and have to rely on vendors and contractors for absolutely everything.
To run a tip-line and collect tips: probably very little.
To act on that information, so you're able to identify and punish violators, without which there's no point in having a tip line: looooooots more.
In many cities, the police don't even respond to auto/bike burglaries -- they're very minimally staffed.
For example NYPD has 36000 ifficers for 8.4M residents or 1 for every 230 people. In Chicago it's 225. In Seattle it's over 500 but they could probably afford more if they weren't paying individual officers up to 400k including non electronically tracked probably fraudulent overtime.
