InkWelle Simple Rental System
The InkWelle Simple Rental System is an alternative to more complex rental systems that are available in Second Life. It was specifically designed to be simple to configure and use, and simple for your tenants to use.
The system was created for customers who have the need to collect rent from their tenants using a simple system. Configure it, set it in the rental space, and leave it alone. When the renters pay the rental system, you receive the money through normal SL means. It is not networked or accessed via a website, however it includes a console that will allow you to check the status of all your units within a sim with a simple menu.
But even though it's simple to use, it still has lots of features. you can configure the rental period, the number of prims, the warnings, and more.