db, it wasn’t the cracked block that gave me pause about the overall maintenance on the vehicle, it was its history. But I still question three separate leaks all at once. Most of the cracked blocks I have sen involved cracks in the cylinder wall. The two that I had that got cracks in the outside actually had big holes blown out of them from flying internal debris.
Without a tear down, how would you determine a cracked cylinder wall from a blown head gasket or cracked head? The OP did not indicate that he problems other than a loss of coolant. If it had a cracked cylinder wall, blown head gasket or cracked head, I’d expect that he would have noticed other problems, and if he had noticed them, he would have put them in his post.