I'd agree that running a server is easy. I built one for my company once. It ran on a standard PC (early 2000's). But for some reason it never worked from my house. (Rogers ISP in Canada) It took me hours and hours to find out my ISP didn't allow me to run a server. BellCanada ISP did, so the server worked on my co-workers system perfectly. To be allowed to run the server I would have had to pay an extra 200$ a month, and be classed a business address. It's not just that the tech is hard, the ISP's don't want it. So they gate keep.