Where do you live? one issue not mentioned is seismic reinforcement. un-reinforced CMU (Concrete masonry units- cinder blocks) do not perform well in an earthquake. To put it mildly.
also I would not be surprised if the gutters did not run into perf. pipe run around the house. I have scene that done where the gutters drain into footing drains made of black perf pipe. The footing drains just distribute the water right against the foundation.
How many drains? Well I'm from Washington state, so we do know rain. and as far as I am concerned I have yet to see a house that had too many drains or too much drainage.
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