SAP has a separate product for ITSM: Solution Manager. Everything else is beyond that scope.

What is important to understand is that SAP is standardized way to do business for ALL departments in big corporation. You probably can't be "expert is SAP". You can be expert in SAP treasury system, SAP data warehouse, SAP ITSM, SAP data analysis, SAP call center etc.

I heard that SAP consultants are paid very well and I think it will stay that way. But I guess this thread sums it up perfectly: it is due to the complexity that these implementations bring to organisation and lack of elegant solutions from modern software development world. So in terms of money it is good, but the trade offs are quite big.