How a $1.50 part can cost $2000

Good advice above. You need to turn that bolt back in some, then out, then in, and work it back and forth, going out only when it wants to. After a while it will come out. If you just turn it out it will snap off at the block then you'll have a bigger problem.

If you remove the steering linkage and raise the engine some the oil pan will come right off with engine in the car. Not an easy job but doable.