I spent 10 hours this past Sunday dealing with a client, just talking to him trying to get his account Setup.
Ironically, I spent another 10 hours on Sunday doing the same thing with another client.
I litterally mean 10 hours too. Talking to him. It's not something I like doing, no plan to do everyday but that was just for the setup.
Otherwise as long as you have everything that works and have good manuals, flash tutorials and a huge KB like we do then support is pretty minimal.