How can I include my independent listings to keep track of?

For example, we have agreements to list our property with Debbie's Villas and VR360 (UK sites). 

I'd like to include details about those sites within OR for our property, but not sure how to organize it.

In addition, we have a local Property Manager and I'd like to add them to our property profile - again, not sure where to add this in where it makes most sense.

Any suggestions are much appreciated! 

Thanks,

Amanda Vanzant

Owner, Ohana Villa Florida