I think regardless of the owners own business shouldn't really be taken into consideration into the decision.
I don't see why one club should be penalised over another because an owner has been succesful in a different industry so needs to be consistent.
I think a fair amount would be a percentage or interest free loan of ticket revenue over so many years.
Some of these clubs run so badly its hard to have much sympathy. The PL hands out over 24 million a year to these clubs already as far as I know.