Doubtful he probably means his "business found" money coming in from cages an animals.
I can guarentee he has money elsewhere to pay everyday bills (phone,cell phone, mortgage), I am pretty sure he buys gas as well if he does not use cash and use a credit card he has a cash advance limit he should use to withdraw cash and send a MO.
If he has a personal bank account ask for a Cashier Check.
Keep in mind that if he has no money available has he alledge how will he build or ship your new cage if he cannot buy the material and Paypal locked his account for an undetermined amount of time. He will take another 1,2,3 months, more? Ask him and tell him it's not acceptable
Paypal, locking his account is not YOUR problem, and if he want to make it right he need to refund your money at this point.
What are his term? On refund, dealings etc?