When you start designing a statistics collection process topics include:

• stats on some tables are more important than others.
• some stats on a single table are more important than others.

Both problems involve some kind of prioritization process, which finally leads to a sorted list of COLLECT STATS statement (See Marcio Moura's blog When is the right time to refresh statistics?)

Processing this list (using a BTEQ script or a cursor in a Stored Procedure) could lead to another problem: