Greetings and Welcome
"need more cooling." Is one of the most popular subjects on most RV forums.
When we are going where it will be hot we carry a portable ac and vent it out the driver side window
Adding a 2nd or 3rd ac is pretty easy, here's a thread.
https://www.thorforums.com/forums/f2...-ace-4162.html
BUT before adding, take a look at this thread, it's very long but worth the read
https://www.thorforums.com/forums/f2...ice-12980.html
Welcome to the forum and keep us updated on your progress