Has anyone stored their car or boat in this type of shelter. I am getting into a real bind with having to move my car very soon. Storage unit places are nice but they don't allow you to work on your car. Average rental rate around here is 110.00 to 180.00 per month. 10x20 unit.

I know a couple of folks who have them.  One is on his 2nd one as the 1st was blown apart during a thunderstorm.  The key is getting them anchored down REALLY well if your area experiences high winds occasionally.  And if you get any heavy, wet winter snows don't let it accumulate too much on top or pile up too much along the sides or ends.  Remember, they are nothing more than really big camping tents. 

That seems really expensive to me! There is a place I always dirve by that sells the metal ones for about the same price. Same shape they just have the sheet metal panels instead of a tarp cover.

if you have a bjs wholesale by you you can pick it up for about 300.00. mine lasted about  5-6 yearsbe fore it blew apart in a really bad storm.

I would recommend the same thing as "79rebuild" and get a metal one.  I got a 12X20 at Home Depot for about the same price.