I'm too impatient to set and forget, especially when you can buy and sell on the toilet.

Lawn maintenance, toilet repair, etc. this was a brand new AC unit costing $8,000.  

They have money, but their credit score is in the toilet.

RUBs are not based on consumption, therefor tenants/residents lack positive reinforcement (lower overall rental expense) to conserve water or even report a cycling toilet. 

The dog jumped up on the toilet, bit into the blinds on the window behind the toilet, and jumped on the metal TP holder breaking it off the wall. 

The reason for the delay is because I initially thought I'd invest in low cost areas of California like Fresno, Bakersfield, Stockton, Sacramento, etc (due to being somewhat within driving distance of the SF Bay Area) but I held back because California's landlord laws made me very concerned.I didn't want to end up in drawn out court battles with a renter just squatting at a place I purchased with my cash. 

Taxes, utilities, maintenance, cleaning, marketing...Gross income doesn't mean squat to your wallet.

The disadvantage I can think of is that, the tenants will treat renting your house as renting an apartment, and require more maintains like clogged toilets.

Since they don't all go up, we do a maintenance inspeciton to ensure there is not a leak or running toilet then we increase rent to compensate.

Turns out, during construction, one of our vendors flushed something down the toilet, causing a clog, which led to the system overflowing and flooding the home.We ended up having to cut and replace drywall in multiple rooms and swap out the wet carpet, which will cost us around $10K.Mishaps like this will happen in Real Estate.