Oil on the plugs is likely worn or broken rings, but could be valve seals to.
A blown head gasket will put oil in the coolant, or coolant in the oil, or both.
What was the compression like?
Not only should all 4 read in the normal range, but be fairly close to even as well.
If its just a head gasket thats an easy fix, so long as the block and head are not warped.
May as well change the timing belt and water pump while its apart, a they are prone to failure, but easy to do if removing the head.
We do NOT need to raise taxes on the people. The government needs to spend less is the answer.