Staggering might sound like a good idea but if they are all month-to-month, word will get out very quick and they may be giving you notice first.I do agree that you should take an approach that lets them see you are going to fix the place and make it more habitable.

Don’t put more into a house than to make it habitable; some people may be lucky to flip in some areas, but flipping is quickly becoming a thing of the past.

Personally, I was concerned that there are plenty more unsuccessful investors out there than successful investors, so learning from a "random" investor was more likely to teach me bad habits than good ones.

Without knowing more specifics of your situation, it is impossible for me to give accurate advice however here are some things to consider:  As an investor, you want to get in the habit of having reserves (once you start purchasing non-owner occupied properties, you will need 6 months of PITI in your account after you make your down payment).  

If you are into buying books, ditch the habit and start using your local library.4.

I'm beginning a new book named, "The Power of the Habit"That is showing a new perspective on the way I've viewed, not only habits, but myself.

Thanks, @Tammy Vitale and @Eric Schafer.

I agree with Wayne Brooks, Pennsylvania has a new "Implied Warranty of Habitability" law that discusses a situation like this.You need to ask yourself.Do I want these to be long term tenants? 

They gouge routinely and out of habit that is my feeling about these people.

It can be from a college that is paid for by the 9/11 GI Bill (tuition and housing allowance covered) or begin the real life stuff (ex. agent or contractor). get a hold on your spending habits, otherwise you may marry the love of your life and hers and your spending habits will doom both of you (a potential mate that doesn't have or won't develop good defensive wealth building tactics will become very unattractive)" That's what I'd tell myself, and will tell my kids if they want old pappy's advice.