We have WHMCS installed in directory billing.companyname.com , but we now want to change it to whmcs.companyname.com . It can not be normally done by uninstallling and reinstalling to a new directory. Someone who is aware of WHMCS and is good at modifying basic codes through FTP or otherwise will be able to do it. A new license key will be required for it be working. That I will get from Hostgator.
It is a serious job as any error may result in our site not functioning.
It is ideally a 10-30 mins job the way I have understood and told by Hostgator. So accordingly quote.