I would expect they would take a higher revenue percentage.

You will be waiting a long time - that as mentioned was a black swan event just like when they went to like 18%.Historically speaking expect rates to be between 5-8%. my recommendation to anyone buying real estate today is if you buy, expect to hold it for atleast 5 years 

IMO outside of a few small markets in the southeast the midwest is the only region in the U.S right now where you can purchase property with leverage and still expect a reasonable cash flow. 

Have a clear understanding of your expected cash flow, ROI, and exit strategy.

You have to expect costs, headaches, and surprises. 

A key lesson was the importance of balancing renovation costs with market expectations.

I've owned a 6-unit for about 6 months now, and the water/sewer bill is higher than expected.

I wouldn't consider it a heavy negative unless the street is super tight and parking is hard to come by or if the street is very steep/busy.The more desirable dense city neighborhoods it's almost kind of expected and off street parking would be considered a luxury rather than a necessity.If you get out into the suburbs I would say it's more of a big deal since more rentals have off street parking or a garage there.

We can only hope future clients get their expected return.

I expected much more.Lesson learned.