What I meant was large inflatable screens. I know that building a structure is another alternative but it is significantly more costly, requires building permits, and is permanent not seasonal. I have seen inflatable screens up to 100 ft wide, what I meant is how do those people keep the inflatable screen from moving around. I do not have a link because i contacted several manufacturer through Alibaba.com. I have gotten three different quotes from the manufacturers that were actually able to make a screen that big. These manufacturers are located in china and they charge significantly less than any company i have found in the unites states.
Here is an example of one of the quotes that i got.
Please check the 50ft*70ft screen quotation as follows:
Material: 0.55mm pvc tarpaulin(sewed type,when you use,you need to inflate continually)
Weight:125kgs, two blowers 25.00kgs
.00/pc,including two sets of CE air blower and repair kit
Material: 0.60mm pvc tarpaulin(sealed type,you just inflate one time,then it can keep for a long time)
Weight:152kgs, one pump 2.00kgs and one air blower 10.00kgs
.00/pc,including one set of CE air pump and one air blower and one Germany zipperand repair kit
For the sealed type,in order to inflate and deflate easily,we add one Germany zipper.