Trail Version of my own Erpnext version ,make multi tenancy but automatic from sign up

I 'have my own Erpnext version on cloud ,
and provide services , now i want to do like official erpnext, i want to have sign up page, that will give customer a Trail version 14 days , how can i do this with my own website that rely on erpnext , i want the client able to go to my website and signup with new domain name and company and new database , and have access to specific modules , or it’s must to use multi tenancy .i want to make multi tenancy but automatic from sign up

One option: You might consider reaching out to frappecloud.com to see if they have any sort of reseller arrangement.