Recently just picked up 2017 big horn 3970rd. I need some help regarding the actual height. Its says its 13'3". Has anyone actually measured this and is that to the top of the ac unit? I am looking at purchasing a metal building to store it under and if I get one that is 13' 10" tall it would save me a considerable amount of money vs going up to the next size which is like 15' tall. Its like double the price