Three years ago I wrote a post about the 10 warning signs to look for in a septic inspection. It's still one of the most-read things on this site, and everything in it still holds up. But I wrote it for buyers. And buyers and investors are asking two completely different questions. A buyer asks: is this system broken? An investor needs to ask: what is this system going to do to my numbers? Those aren't the same question, and the second one is worth a lot more money. Because h