Head gasket repair

Hi,

I have a 1998 Ford Escort SE with 133,000 miles. The engine overheats when I turn on the air conditioning or I drive with more than 60mph.

My mechanic quoted me at $1,100 to repair the head gasket, replace the radiator caps, and flush the engine.

Is that a reasonable price? Do I have any other options. I just graduated college and started a job and cannot afford in any way this price.

Any advise would be greatly appreciated.
Thank you,
Alina