The clients I've had so far have been personal friends with no computer abilities ("whats ftp?") So, yeah, I think I am thinking of a multiple domain account, which gives me a ton of webspace that I can share with clients; I can put all my htmldocs & images in a clients subfolder, but there's only one ftp account.
I guess that account is inappropriate for reselling unless the client never wants to access via ftp, right?

This account is much cheaper, and might be a good way for me to get started before I spend the extra $ to upgrade. Want to be sure this will be a successful venture before committing larger amts of $. I'm not sure what features I HAVE to have in order to resell, because so far the only need I've had is webspace size...