Lot of opportunities after a frozen ATPL:
-pay for a FI rating and get paid peanuts
-buy a type rating + line training with no job guaranty
-look for a job and wait several years still without any guaranty.
-apply at BA, KLM to hear you are too old or have too much experience.
-go to africa to fly a 172 for 500$/month.If you find a job there.
-just be lucky and be sponsored by an airline with a bonding contract, but sits are very very limited.