having partaken in my share of this strategy.. difference was I was the HML putting the investor into title.. we just call it rate term refi... that model died a humungous death in oct of 2008... to only be revived about 2 years ago. and now you have lenders putting 75 to 80% debt on low value rentals all over again.and I predict in 3 to 5 years there will be another wave of foreclosures as burnt out landlord symptoms take root... what was really great for the industry and economy was the 2008 to 2012  were so much was being bought for cash... if folks start ripping cash out again.. you now take a asset that could never be foreclosed on and now it can be.. so law of averages.

A sump pump is a treatment of a symptom, not a cure for the disease.  

My concern is there may be a break in the sewer line somewhere under the slab, but it would seem that would cause other symptoms besides just these sinks.

They are a symptom of mismanagement, and mismanagement will make any strategy ineffective. for example: If you pay cash for a house and didn't account for a 10K roof and don't have the funds to repair then It doesn't matter which asset management strategy you prefer, you're toast!  

If you read the hyperinflation article you see that the US does not currently have any of the symptoms neccessary for hyperinflation using historical examples.

But don't know which is the correct way of fixing the problem, not band aid the symptom.

Otherwise you could be wasting even more money on legal aspects that are not a remedy to your symptoms.

If the tenants find out or even have 1 or 2 unexplained headaches, or any other unpleasant symptom, you are prime for a lawsuit.

Money is a symptom of excellent performance.

My son almost passed out, my daughter and wife both fell ill and the internet installer is lucky to be alive. ( I have a recorded statement from him explaining his symptoms).I spoke with the seller and he is basically calling it my problem in not such a pleasant way.