Steven Zahm@ Bruce
RE: In regard to the custom template question: is there documentation on building such a template?
Sorry, no, their is no documentation on building a template but if you review the code for the Tile Plus template I think you will be able to figure it out fairly easily if your know PHP. I recommend phpStorm, loading Connections and WP as libraries for code completion.
If you like the template and just want to tweak it, then template override files might be the best solution. You can also load custom CSS files. Both are update safe.
RE: Is it possible to have filters on any fields other than category?
Yes, I do have an advanced search addon available to those who purchase either the pro pack or extension pro pack and request it. It’s not generally available due to it being a little complex to setup, so I do offer setup as a service. If you know shortcode well, it is really not that difficult. I can provide it and instruction if you purchase one of these those bundles.
Hope that helps!