Well, imagine the sewer main has a partial blockage, and imagine there is a lot of pipe (and thus a lot of sewage capacity) between toilet 1 and blockage in the sewer main--when you flush that toilet, it doesn't back up because there's plenty of pipe to hold the sewage (although, if you repeatedly flushed it, it might back up...and eventually, as the blockage in the sewer main gets worse in the future, it will probably eventually start backing up)...on the other hand, imagine that toilet 2 has minimal pipe between it and the sewer main's blockage (and thus, minimal sewage capacity), so when you flush it, the water almost immediately meets the blockage, causing that toilet to back up.I'm not saying that's necessarily what's occurring at your property--but it's an example of how a blockage could cause one toilet to back up, but not another.To determine whether the problem is indeed caused by a sewer main blockage, watch the scope video, and ask the sewer scope guy to show you where the blockage is on the video.Hopefully that helps...Good luck!

Any idea or comments for this type of style of investment, anything to watch for ?

Look If they know they are being watched and police may be around it could stifle this unwanted behavior in its tracks .

I'd watch this KXAN News clip for more clarity on the topic - https://www.facebook.com/KXANnews/videos/301092587782116 

Hi,
I am just curious what sources are out there to keep track of things going on in the market.
Thanks,

Tenants and property managers just sat there and watched.

She’s quite the business lady, she makes enough money to pay back her “investors” (my girlfriend and I), her expenses, and make a profit.

Watch for my next post:   How to approach a Landlord to rent to you!

I watch biggerpockets videos religiously and can’t wait to apply for the skill bridge program soon!

Time spent reading biggerpockets, browsing the MLS, crunching numbers on potential properties, watching RE videos on YouTube...those are not rental real estate trade or business hours.Hours spent bookkeeping for the rental, interfacing with your PM, interfacing with contractors, interfacing with tenants, etc are generally ordinary and necessary rental real estate trade or business functions.Income tax law is complex.