Engine block freeze plug leaks

It’s a V6 transverse mounted engine. Very little clearance - air conditioning compressor on the left, oil filter on the right (which can easily be removed), exhaust manifold hanging down in front + radiator fan. If by “tap” you mean swinging a hammer I don’t see that as workable unless you remove some of the above. Maybe there is a specialize tool for this type of work.

My cost estimate is based on having the work done in a shop - drain fluid & remove some of the above to get access. You would have to work from under the vehicle.