I have already answered that question in real life by selling all my low-income rentals in 2007 thus changing my life for the better. (did a tax deferred exchange into medium income properties.) High income usually does not have sufficient cashflow and has more demanding tenants, so the only high income property I own is a vacation rental. The new rentals are mostly single family houses where my tenants are either professionals or solidly blue collar, hardworking people. It was a great learning experience in how to manage rental property, so I would recommend buying a couple of really cheap rentals when you start out to make your mistakes on a smaller scale. However, if you already have experience in managing rentals or have a good mentor, I would say to run the opposite direction when someone offers you a good deal on a property where you will not be able to get tenants that you would choose as friends.
I would not have purchased those properties if I had it to do over again.