ESR and ID object naming convention Best practise

Hi Experts ,

Need your help

I have 50 interfaces . 10 - Finance, 10- Procurement , 20- HR , 10 - Material

Can you please let me know how we should create the SWCV names?

Is it advisable to create Folders in ESR and ID?

Should i create 3  tier architecture  in ESR

i.e 

SWCV_FIN_ Sender

SWCV_FIN_ Central

SWCV_FIN_Receiver

SWCV_PROC_ Sender

SWCV_PROC_ Central

SWCV_PROC_Receiver

Created sender DT,MT etc in Sender SWCV , create receiver DT,MT etc in receiver SWCV and  Message mappnig , Operation mapping etc in Central SWCV

or

SWCV_FIN

SWCV_PROC

create all obects of a finance interface in FIN SWCV

Please suggest which is better approach and recomonded one  in PI 7.3?