Yes, hosting is I buy the servers and ship them to a 3rd party to put them in a rack. They have redundant internet and power.
Servers are measured in 1Us for their height. Theoretically 40 U's can fit in a rack.
The Miami datacenter charges me for a 1/2 rack, so I put 20 1U servers there.
The new jersey datacenter is double the price, but closer to the bank servers.
if you just want to start with 1 server, you can get it colocated anywhere for $100 per month.
So for that $100 per month, you have the computing power of 40 vps's (not including the cost of the server).
Go to eBay and type in "1U server" and "blade server" to see.
sounds like a lot of cash to lay out for a server, but if this is your profession, it's a cheap investment in the long term.
In terms of repair, most of mine are under a dell on site service contract. But some are not. For those I pay the datacenter to try and fix the problem, otherwise I have them shipped back to me. In the U.S. figure $100 each way for UPS shipping.
they don't usually have problems, but I have had it happen several times, but remember I have LOTS of servers so the odds are higher for me.
On the other hand a vps is a cheap way to get started with a minimal cash outlay. But it will limit you in the end.
I'm happy to answer any specific questions you might have, I've done this for a long long time.
-The laziest man at LazyManForex-