I guess for very small companies that do not care whether your website this online may mount it in your office but will never be comparable to having infrastructure datacenter. It is no longer just a matter of having a ip static, but hardware to withstand 24h infrastructure for a cut in the light, to have several operators in case one goes down, there are many factors ... regardless something that is becoming common as a DDoS attack. You speak of taking a vps, cpanel mount, Then ... simple ... if you have problems see if the child is able to solve the problem that the company may resolve in minutes. comparable not all that you are talking to a "decent" company. Companies will continue paying for a quality service whether it is possible to mount locally. I have seen many "empresillas" playing business, leave all his lying clients, sell and / or change of name ... That is children and anybody can do. Is that what they look for serious businesses? They are many reasons that regardless of whether you have enough bandwidth to set up something like this is impractical. I've seen operators offering 200 mbps but not the solution sought.