Hello,
I have recently built a web hosting company from the ground up for my previous employer. This included 15 custom built servers installed in a full rack at a data center (by myself). These servers were loaded with CentOS and CPanel. To handle the billing I installed HostBill from hostbillapp.com. This billing system supports DirectAdmin as well as multiple payment providers. I can recommend great affiliate programs for domain registration and SSL certificates. I will need your input on multiple fronts but I can easily handle this job for you.
I can also manage the server for you and provide support once you are ready to go. I have a team of guys working for me now and we can easily provide any SEO work that you need. Link building, article marketing, video marketing etc. Will be happy to do this for you on a monthly maintenance contract so you can keep your expenses at a manageable level.
Lets talk.