Maybe you can associate html files with or use open with to pass them into a script that calls python -m http.server and creates and opens a url to the file via the python server in the browser.
My understanding and it could be wrong is that they can't lower their rates, (and might actually have to increase to compensate for more vacancy) because it will affect their ability to finance the buildings if they have lower rates from whatever math is used to calculate the soundness of the loans. That could be causing the stickiness on price you are seeing (if it's not apocryphal).