24/7 is easy, I've done support via my PDA & GPRS phone sat on holiday in my tent I forgot to pre-pay one of my servers on that holiday so paid it again via the PDA whilst sitting in a Tesco car park in the middle of Norfolk. As I stated in another thread, support is more about managing customer expectation than doing support. The technical bits can be resolved by careful monitoring and keeping the system clean & tidy.

I actually got into hosting as an extension of my consultancy business, my site needed hosting as did a few others, I ran a small reseller and got messed about so much that I simply decided as I was a long time SysAdmin, I might just as well run my own server as I'd make a better job of it than the 3 previous providers I'd had. The rest as they say is history. I still host my first web hosting customer