ok... the form [frmType] is pretty sparse. I'm assuming you want it to fill in the rates automatically from the choices you select, but you'll going to need more infor in your query to do it.
Using the above query for the record source of your list box will give you the single types your looking for, as well as the min and max values to populate into the range fields you have on the form. You can display just the property type and hide the min and max values. You would need to either add code the on change event of the list box, or reference the list box directly from your min and max fields.
SELECT tblProperty.PropertyType, Max(tblProperty.NightlyRate) AS MaxofRate, Min(tblProperty.nightlyRate) AS MinofRate
GROUP BY tblProperty.PropertyType;