Can I build a SAAS solution using wordpress?

I sell one-page websites built that are built with ACF PRO.

Right now everything is done manually. Customer pays offline and I create the page with demo content and give them the login credentials to add their own content to the page.

I want to automate this into some form of SASS solution which will accept payment and create the login ID and page, populate it with demo content.

I know there will not be exactly what I want but just looking for something that which I can modify to suit my purpose.

Any suggestions?

 

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