I read from the faq that there are tax and legal obligations, that there are some guides and a free call, and that there won't be any ongoing assistance unless Orrick and PwC are hired.

Do you have any experience with them? Do you suggest any other service that would help on this? A while ago I found tempcfo (used by stripe itself, slack, and others) and indinero, I wonder if they could help on the ongoing assistance and which is the best option