Can some experts help me find the way to become White Label SEO provider?

Hello Warrior Experts,

This is the recent conversation I had with a prospective client, check out:

Client : send a list of the services you provide,prices and some samples to my email.
Me : Sure.
Client : I need a full list of what you do and prices for it. I already do this with another firm, I have 100s of clients I sub out this work for...so I need white label services
Me : Will do that.
Client : ok, keep in mind that I am reselling the services so I need a bulk white label price

This prospective client is asking for white label price and SEO services! Since I don't know what exactly he is asking, I have done some research on Google and understand that a white label SEO provider(can be a person/company) helps a person/company to provide SEO services to its clients being anonymous to those clients. I think I am right up to here! If I am correct, what does it requires from my side to be a white label SEO provider? how should I qualify as a white label SEO provider? What are the technical and non-technical things I need to develop on my website? How long will it take to update my site as a white label SEO Service? Any examples of such things are much appreciated, thanks in advance!Please help me its urgent!!! You can also PM me if you feel to explain more elaborated details.

Please Note: I need suggestion only from those who are experienced in this program rather just introductions or definitions.

Hope you can see my website link, when you look at my profile, if not PM me.

Awaiting your responses,
Pradeep.