weebly or wix like solution

We are are a web hosting company, we want to offer a front end UI where user select an Web templet >> Domain >> Hosting package >> and complete the basic design >>> once they submit the payment their web site in Wordpress will be published. We have WHMCS with WHM running on Linux as Backend, the payment gayway and hosting packages are already there just need to communicate with the new Front end UI On a high level, this will work on the fly web design solution for new users. New Users will be able to create their basic web site in 5 min by just selecting the web templet. This will work like other hosting companies like WIx, Weebly or Squarespace or godady Central are offering the web hosting with web design