Monitor multiple receive locations?

Hello gurus,

I've got 50 different folders to be monitored for different clients and invoke different processing logic (say maps & .NET components). I wonder what is the best way to accomplish this? Have 50 different receive ports?

What I am looking at is putting all of them (files in different folders) into a MSMQ que and based on content or some identifier (I can use folder name as client identifier and dig into configuration file for each of the client to get the map name),  – invoke different processing logic there after. But how to introduce them into BizTalk? A receive port for each folder?Doesnt it cost the performance?

Thanks in advance.