The business  plan required will be used to raise funds for the business.
The 20 page limit is only a place holder  what ever it takes to develop a complete business plan.

the New business – Argyll Group, LLC – is a start up version of the following companies ;
below are the websites to a couple of successful Single Tenant Net Lease Developers

https://hutton.build/
https://www.embreegroup.com

https://n3realestate.com

https://www.boosdevelopment.com

https://srsre.com/services/development/preferred-development-build-to-suit
https://www.embreegroup.com

https://n3realestate.com

https://www.boosdevelopment.com

https://srsre.com/services/development/preferred-development-build-to-suit

The individual are all former employees of the above mentioned companies.