"Volume fixes everything" is a well known saying (I admit in my circles) that typically applies to manufacturing businesses, but it is not unique to them. Conversely, one can't cost cut your way to success!
DMF is used to cover expenses so I'm not sure why you think I think that....? I haven't checked SUM accounts in detail but I would expect all RVs are using DMF income to cover expenses that are not funded from weekly fees.