That's what my neighbor thought. Just walking through the RV is enough to shake one loose after a while. High winds (gusting to 35 mph) rocked his enough to wiggle it enough for the AC to drop and land just two feet from my car. His was mounted like you say you mount yours, but he added wooden bracing from the unit to the ground, as a "safety measure". Good luck with yours. I wouldn't take the chance. But, I bought a fifth-wheel with 50A service and two ACs, because my "home base" is in Louisiana. We're full-timers who haven't gotten the "snowbird" thing down pat, yet. We've even visited Reynosa, Mexico, over the Fourth of July! Even with two ACs, one 15K and one 13.5K, sometimes it takes up to six hours to cool the RV down after parking it, but the trailer is over 38 feet long. RV ACs are only designed to drop the inside temp to 20 degrees below the outside temp.