I want to own mini storage’s

I would really like to get into business for myself.  I have heard that storage facilities are a good thing to invest in.  How do I go about finding mini storage facilities for sale?  Is it difficult to run a business like that.  I don’t want to get in over my head, but I would really like to have something that is mine, and that I can feel proud of.  I think it would be a great venture for me, getting to know people, and learning all about running a business.  I would like to start off with one, and then maybe one day have more.  Does this sound realistic?