After you have defined that the listing is for Long Term Rental on the [Content > Type] tab, you will have one more option called Long Term Rental where you can enter a title, a description and other important information for this business:

The blue area of the registration is information that will also be used for the Real Estate module, in case you also advertise the product for this line of business.
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Now that you know where to set up the specific content information for Long Term Rental, it is time to see how to register the negotiation amounts for this segment!