We live in Wauchula, central FL. 50 miles inland from Sarasota. We have installed a 5000 btu home air conditioner in our
Scamp 16. It sits in the bottom of our closet and exhausts thru the floor.
If you'd like to see our installation, you'd be welcome to visit. I'll send you a PM with our information.
This approach did not require cutting any holes in the side walls.