Man, your buyers have the worst luck.

Otherwise, it's not worth the time learning, because you do have to make mistakes. 

Any mistakes to avoid?

@Gabriel Alvarado several times in the past, we've found that many agents make the mistake of using their sales tools for rental situations.#1 mistake is not using the right advertising websites correctly.So, ask your agent for a list of websites they are advertising your properties on.May also help if you post JUST the address here - we should be able to do a web search and find it - or there's an obvious advertising problem!

Verifying last 2 years of rental history and income extremely important to find the “best of the worst”.Make sure you understand the Class of properties you are looking at and the corresponding results to expect.PM us if you’d like to discuss this logical approach in greater detailP.S. we've ranked all of Detroit's 183 Neighborhoods, so you can make more informed investment decisions.

You will make mistakes.

You are spot on: not considering annual increases for every property is a cardinal mistake. 

@Ming Li HerreraRecommend exploring as many sources as possible to get referrals AND cross-reference them to get as much accurate information as possible.Check out NARPM.com, BP’s Property Manager Finder (BiggerPockets: The Real Estate Investing Social Network), etc.Also, encourage you to learn from the mistakes of others - by reading posts here on BiggerPockets about owners not having their expectations met by their current Property Management Company.

Those communities were the worst hit during the foreclosure crisis.

Bad IT service folks not getting it done.Unless it’s ATT because they are the absolute worst.