为啥美国这方面这么发达？在中国会有机会吗？理论上来说大城市里的住户更需要这个服务。是不是可以是物业公司的一个机会？
10.6%的美国家庭租用自助仓，平均月费89美元。
行业年营业额 395亿美元
Self-storage sector snapshot
U.S. self-storage sector snapshot Data
Annual industry revenue $39.5 billion
Number of storage facilities (range) 49,000+
Total rentable self-storage space 1.9 billion square feet
Self-storage space per person 5.9 square feet
Percentage of households that rent a self-storage unit 10.6 percent
Average monthly cost for a self-storage unit $89.12
The national average cost per square foot is $0.91 per month. (full year 2020)
74 percent of the industry is still mom-and-pop shops
Largest self-storage operators (publicly traded) in the U.S. (by annual revenue)
$大众仓储(PSA)$ Public Storage: $2.68 billion (2019)
$外太空储蓄(EXR)$ Extra Space Storage: $1.3 billion (2019)
$CubeSmart(CUBE)$ CubeSmart: $643.9 million (2019)
LSI Life Storage: $574.7 million (2018)
NSA National Storage Affiliates Trust: $387.9 million (2019)
UHAL U-Haul: $367.3 million (fiscal 2019 – self-storage revenue only)