A drip under the sink may not seem like much, but if the bottom of a cabinet and floor rots out you will have a huge expense.  4th)  Keep a reserve of cash.  

I purchase this building off the MLS with the Berdan Real Estate Team (http://berdanrealestate.com/)- can't say enough good things about those guys, honest and have a great understanding of multi family:Why did I chose this place:https://www.redfin.com/IL/Chicago/2441-N-Avers-Ave...1) Solid Brick Building, good level floors, dry basement with no evidence of water problem (until I had my pipe problem above, but kind of my fault), previous owner was there for 26 years and was diligent in taking care of things like the roof and tuck pointing.2) Location: nice B- class area that has good middle of the road renting options.

The biggest thing I would say, Demarkus is that the house was promptly gutted above the flood level and considered "clean and dry".

Maybe check the sink traps to see if they are being sucked dry, tooPerhaps the old machine had air space around the drain that allowed a vent, and the new one was installed tighter, closing off the vent.  

A man who could afford fifty dollars had a pair of boots that’d still be keeping his feet dry in ten years’ time, while the poor man who could only afford cheap boots would have spent a hundred dollars on boots in the same time and would still have wet feet.

You either get the principal with interest or you get to foreclose on the property this is where it get a bit tricky but still cut and dry if you stay on top of everything.

I know it sounds dry but make sure she is a keeper, has your values, saves money and does not want to buy everything that she sees, trust is also very important for a good marriage and happy finances.

In some of the jobs I have had done, I strongly suspect the guys have known there were likely to be extra problems (like rotted joists) but they did not quote for them or mention them ahead of time -- or really get up on the roof and try to look for them.

Our grass dried during the drought restrictions, so we ripped it out  and the weeds out (It's just dirt now where the grass was) and it's been 90 plus degrees (112 in the summer)  where we live until December, so we couldn't replant sod.

The basement had been clean and dry, but apparently encountered a moisture problem over the summer and now the back sides (all exposed particle board) of the cabinets are covered in green and white mold.