As you may know, OS Property extension is a paid Joomla extension. You must purchase it (the cost is $39.99 for the full package) to use it on your site and get our free supports. With each license of OS Property, you can install and use it on any websites / domains that you have. However, you get only our free supports for one website / domain for each purchased license. So if you would like to get our free supports for multiple websites / domains, then you must purchase multiple licenses of OS Property, each license for one website / domain.
Following is the link to purchase OS Property from our official website: http://joomdonation.com/joomla-extensions/os-property-joomla-real-estate.html
OS Property package includes:
All of them are in a package and you just need to install the package one time, then they are all installed on your site and ready to be used.