Running the Books is intellectual work.
All about logic, math, probability
Shylocking is taxing in another way, you gotta get a good mix of
of psychology and intimidation tactics, and for the unwise borrower be willing to dish out some painful incentives.
All depends on what you're equipped for, and ready to take on.
Me? I'd prefer sharking. Seems easier.
But managing a bok seems like if your smart in a Lefty Rosenthal kinda way the money just piles up hehe