Is my vision for SaaS implementation correct?

Question

Software design

I want to make SaaS.
I have the following vision of its implementation:
A customer appears (buys a license from me for a month), I buy a new VPS for a month for his needs, set up a domain for the customer, start his personal database (i.e. each customer will have their own database , and not in the users table, the customer_id column), I clone the git code for this VPS bought for it, and give it to the customer for free use.
And I will have my own server, on which I will already have a plate with customers, in which there will be info like links to the production of each customer, when the litsuha is extended / ends, and all that.
Is the vision correct? I would be grateful if you correct me if something is wrong. Thanks :)