There is nothing you can do to postpone the repair or lenghten the live of a defective head gasket.
Make sure you get an OEM gasket. Stay away from ''jobber'' type of gasket, unless you want to go ,through the job again in a few months.
I've done mine years ago and took the head off without the intake/exhaust. it's heavy but doable without a hoist.
While the head is off, I would have a serious look at the valves, valve guides/seals. It is the best time to have a job valve done since it is the same work/labour involved.