How many Contacts can be applied to an Account?

We are event organisers. Customers employ us to setup and arrange events for them.

Im thinking how best to setup the CRM.

The CRM needs to hold details about:

The event (date, time etc)

Our customers (People who hire us to hold events for them)

Suppliers (Companies that we recommend to our customers to use. Security, Venues, Lighting, Audio etc...)

Guests (People who will be attending the event).

How best to do this?:

Should customers go into the Contacts module? And then Suppliers into a custom module, and the guests into another custom module? Then each of these modules connect to the event (Accounts module) using lookups? (baring in mind that one supplier can be attending more than 1 event; and 1 event will use more than 1 supplier)

Or should I setup customers, suppliers and guests as Contacts. Then add these Contacts to the event (Accounts module)? If so, is there a limit to how many Contacts can be assigned to the Accounts module? We may have 250+ guests at an event.

What do you think?

Thanks