I guess I will bump this.
You might have waited a bit longer than 30 minutes so someone could actually get round to reading it and answering :devious2:
Not telling you now
If you are starting up a webhost and cannot afford the extra for WHMCS or clientexec then TBH I don't think you are financially stable to start a webhost.
iHost is not free but is pretty good and cheaper that the other ones, email them and ask for a discount.
Link: http://www.ihostdev.com