Now that I have your attention :
Unfortunately, my coach will be spending this winter not under cover. Here in the northeast it is not unusual to accumulate 1 - 2 feet of snow. One foot of snow on the roof of my 30' coach will weigh 4,800 lbs.. Decided to place jack stands under the frame, having raised the coach's normal stance by one inch. Any thoughts? Please note that I like snow more than sand.

20 lbs/sq.ft. pretty heavy packed snow don't you think? I know; a shovel full felt like 40 lbs. per!

According to my "smart" phone, yeah 30x8x20. According to my chiropractor, 75 (dollars).