Beyond just paying the Poonslave to run the Ferret Mines, it should also be noted that ferrets are extremely expensive to care for. They need specialized food due to being obligate carnivores, they get Ultra Turbo Cancer if you breathe on them wrong, and vet bills for them cost literal thousands of dollars since they're considered exotic pets. In fact, many of the ferrets in the Rescue are owner surrenders, people who found that out the hard way and realized they were materially unable to keep caring for their ferrets.
Expenses for Mald's ferrets must be even worse since many of them are old, sick, or injured (just by nature of them being rescues), meaning vet visits are extremely frequent. Also because there are sixty-two of them. Now he's in the process of spending one million dollars to build a new facility that will hold 250 ferrets and nearly quintuple his recurring expenses.
What's his backup plan if the tank starts shrinking? What if the Burrito Index gets too low? What if his viewer and follower counts start rapidly falling because of a wave of bad PR?