Just to let you know that Prepper Racks make a Drop down Tire carrier that allows you to mount to your Tow hitch but still allows you to tow with the Hitch. I had one on my 2005 4Runner but sold it. Now I have one ordered for my 2000 Lexus 470.
Skip the under the carriage tire carrier and go with a Simple drop down... https://forum.ih8mud.com/attachments/75dade73-3fc3-4205-8a8a-a04fdfd76c14-jpeg.2515593/