You might want to check on the eviction laws, though. You might find that, notwithstanding the ordinance violations, you still cannot make him move without a formal eviction, and if he pleads a pauper's oath--that he cannot afford to defend himself against this--he could stay there for much longer. You may also have to prove that you were not responsible for the code violation, and may find you are in less overall trouble if you just move him into the house!