I was a webhoster
In 2009, I was interested in webhosting and datacenters. I wanted to know, how to design and how to run them, so I bought some used IBM servers and started playing around. The next step was ordering a leased line and then, I begun to pile up servers. The first electricity bill caused some sleepless nights and I decided to found a webhosting business to fund my hobby.
As you can see, little is needed to establish a running webhosting business. At least, I managed to cover all expenses ;-)
In 2012 I shut everything down.
If you ever wondered about the domain "jumping-frog.de": That's how I called my "company".