2001 Cadillac DTS with 106,000 miles is leaking antifreeze. Is it worth fixing? on 2001 Cadillac DeVille DTS

Car was serviced regularly by Brogan Cadillac dealer and all work is recorded. I'm told antifreeze going into the engine because of head gaskets and a new engine needed. How much will that cost and how long would it last? Also informed another engine would cost $10,000. I'm not rich!!!

Asked by for the 2001 Cadillac DeVille DTS