My crisp answer for your question would be to replace "or" with "and". Yes, the answer is "S-Builder Co-op and PSAs To Go"
PSAs are either you bring them to SFI business from your personal list or buying them through auctions.
S-Builder Co-op is something you can purchase and based on the sign-ups, you will get your own share.
To summarize, you will need to put your effort to bring in more PSAs who can further do duplication and S-Builder Co-op are something a share that gets allotted to you and it takes significant amount of time to bring or keep them active.