Well, going by Amazon's product dimensions of 18x9x14 the volume is 2268 inches, multiplied by 3 million = 6,804,000,000 inches. The lowest prices I found for a 10x10 (so 120x120 inches. Uncle Bob's Storage space was $119. So 6804000000/14400 = 472,500 * 119 = $56,227,500 per month. That probably doesn't mean much but it answers your question
Disclaimer: I suck at math.
That is awesome, thanks.