All of the above...plus get a look at their back end system.

I've thought about that, good to know there is a system to automate that!

We then have to cut a manual check to cover.Are you saying that for normal operations, they have a system in place to monitor & pay the taxes?

Schedule 80 does indeed have thicker walls and can handle "more pressure" however you are talking about a sewer system, which will not be under pressure. 

I would recommend sticking with a multi-family that has solid systems and at worst, needs aesthetic upgrades.

Additional features include new SS appliances, recessed lighting, new 200 amp panel and updated electrical in kitchen, a French drain system, and 1 car garage w/ workshop.

Does it have a good school system?  

Most of the "not so good" ones I had to find out the hard way, having spent extra time, effort and $ to be unpleasantly surprised.I have already went through all the permits and old records looking at microfilms for hours at the city's archive office.But I still have a lot of questions that I believe this person can answer.  

Had a tenant moving in, mis-matched coils and too small system.  

@Nicole Fischer Check out the LEED Rating System and look for contractors experienced working with it!