Is your question focused on the Parcel Viewer web application template contained in ArcGIS Online? Or, are you talking about the Tax Parcel Viewer for 10.2 found on the solution site? Both have been deployed by many local governments and I'd like to understand the challenges you are having more fully. Are you trying to get this app running on a local web server with your parcel data? Assume you've review the help documentation and published the services required for the app.
I am talking about the Tax Parcel Viewer for 10.2 on the solution site.
Challenges, well it looks like I have to duplicate my data to match the Local Government .GDB. Am I wrong?
Also some of the layers needed I do not have access to like Foreclosures, Sales of homes.
I would like to host it locally but I can not find a sharingurl location like I have been used to in the 10.0 Parcel Viewer.
Thanks!