Not that I'd want to do it or even be part of it since I've left any and all of anything called "scientology" behind long, long ago, but...
If a group of people were interested in growing an organization larger than a few individual practitioners supported by a secretary to answer the phone and handle the mail and file stuff, which would have as its purpose obtaining clients to which the organized practitioners could "deliver" their version of the "tech" (whatever they want to call it), to me it seems really simple and obvious.
First, throw out ALL of Hubbard's "Admin" -- the green on white and the blue on white and anything he had to say about running an organization, which includes all the organizational "ethics" material, the policies on how NOT to pay bills and staff, etc. This is what makes "scientology" so crazy and unmanageable, and if you really take a good look at it:
what actual practical purpose does all this serve?
when compared to other, successful enterprises: NONE.
You could save a selected few pieces from the morass, such as the "ethics conditions" as they are used for personal "conditions by dynamics" type actions if you feel that's useful. I can think of a small handful of other bits that might be useful; but almost all of those would then be part of the "tech" used for the benefit of individuals, not as organization-building/protection tools as they are now.
Then form up an organization/company based on the simple, sane principles that successful companies all over the world have used to build effective organizations and obtain their market share of their local and/or world-wide economy.
There are top-down pyramid-type organizations, and there are wider-based organizations that invite "management" input from everyone, so pick whichever looks more likely (in your opinion, with your particular group) to succeed. It would behoove the "founders" of such an enterprise to do some research on business management theory and tools or hire someone with college education in business management to help them set it up.
One very simple and effective form which "grows" naturally and logically is the three-division structure:
(1) production -- making and quality control of the actual product, which in the case of scientology would be the various training and auditing actions and completions of steps of progress
(2) sales -- reaching out to and closing and taking the money of the potential clients through marketing activities -- market research, advertising, defining demographics and the approach to them, etc. You can only mine the pool of "ex" scientologists for a short while before that pool dries up
(3) administration -- the record keeping, bill-paying, phone answering, mail-delivering, legal compliance and protection, etc. that ensures the organization keeps on running.
Hubbard's organization had seven divisions with at least three departments each -- I challenge anyone to tell me of any function in that clumsy structure that could not be reassigned and "managed" in one or another of the simple three-division structure I've outlined above.
Anything else is completely extraneous, induces chaos and anxiety in the personnel and their activities, and eventually sinks an organization under its own weight -- as would have happened with CoS LONG ago if not for their so-called "monopoly" on their product, the "brainwashing" that convinces people it IS a monopoly, and its various forms of threat and intimidation which for years kept any former insiders from exposing the truth about its internal machinations.
Of course, to make this work on even a small scale, and particularly on a large scale, you must begin with a "product" that has real value to the potential customers who might buy it.
IMO that is the biggest hurdle to overcome in selling/ distributing "scientology" as we have known it.
Just sayin'