I have a few posts on resources. Here are some specific places to look for professionals to help you build you project

https://www.cohousing.org/directory/wpbdp_category/pro/

Step by step how most cohos are done:

https://www.cohousing.org/create-cohousing/create-it/

some definitions, thanks to the cohousing listserv folks who answered my question – what is a developer and consultant.

developers invest their own capital in projects

development consultanta provide services to groups for a

fee and do not invest any of their own capital in the project. 

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