legal process workflow, rules and repository requirement

I would like to re-develop my current business application in Zoho.

It is basically a workflow, rules engine and document repository system:

- we have several Clients, each with strict confidentiality and non-sharing in place

- however, we also have shared pools of analysts with access to each Client environment

- our Clients have Relations (customers, partners, suppliers etc) - and we risk-analyse these Relations for our Clients in various planned Projects

- for every Client, the primary table is a Relation table (pref. in a tabbed-view)

- the Relation has related Legal Entity and People tables

- the Legal Entities and the People are used to build a "Parent Tree" to depict the owners (multiple-levels) and directors of the Relation (and parents)

- this Parent Tree will need to be graphically depicted in a (pref.) clickable "Network Diagram" / org-chart form

- there are various other tables defining Relation Attributes and Risk Factors and levels-of-risk (e.g. Location, Legal Entity Type etc.)

- Analysts need to be assigned "Risk Analysis" task (group assignment would be a plus) by their Team leads

- these actions need to follow a risk-analysis -> peer-review -> case-review -> customer-review wworkflow (with accept/fail, escalations, re-assign all possible)

- the Risk Analysis step itself needs to follow a detailed "mini-workflowed" set of business rules

- the Business Rules need to be tabled into a Rulebook and different rulebooks may need to be defined per Project

- the Risk Analysis step needs to handle the presentation of additional and alternative rules dependent of the aforementioned Client Attributes and Risk Factors

- every Risk Analysis Business Rule needs to have associated Evidence attached (e.g. screen shots, certificates, PDFs etc.)

- the PDFS etc. need to be attached to an Evidence table that will have various categories, validity-dates etc.

- the same Evidence may also be used by different Business Rules, Risk Analysis activities or even Clients

- the Review steps need to be as intuitive and easy-to-review as possible with "hover" views on the underlying information etc.

- traffic-lights, audit-trails and versioning / revision-history is vital

I'm expecting all of the standard ZOHO CRM roles, visibility, user controls, views, search, assignment, reporting, upload, download, Google / other integration etc., etc. to be defaulted. Integration into other Zoho modules (mail, Campaign, Service) and Call-type time-capture and billable reporting.

My biggest concern is re: the Riak-Analysis-Business-Rules step - this is def. something that will require coding and feed from serveral of the supporting tables etc.