And now we know why not everyone is investing in real estate. This is very sad. I've had similar situations regarding heat and internet and all that. I hope it's a beginner mistake, but I still find myself losing $50 here and $50 there because I don't have a system nailed down, and I miss things. So, don't worry, you're not alone, and if you push through this, you should be over the shakes in a couple years, and if you do push through, you will be well on your way to being a good investor... remember the end of all the BP podcast where the hero says perseverance is the key?
My first question is when is the lease up? If it is a 1 year lease, you have 5 more months before you can get rid of her. Yes, this might seam harsh, and they might be nice people, but the relationship is not working out well, so move on if you can legally. When I had a similar situation, the tenants had hinted that they might move out too. I talked to an attorney, and he recommended that I take the $ hit... if they would agree to leave. Cash for keys. It was agonizing, especially since it took me two months to fill the place, but looking back, it's the best thing I could have done. So, you might hint that 'if they are upset with the apartment' you'd be ok if they moved out, and you'd give them the security deposit back. If they don't go for it... just hang in there for a few months. The $250 is not worth trying to sue for, and if they do pay every month, count your blessings.
Also, the $250 is kind of the fault of the property or the water company. Yes, it could have been avoided with better communication, but it is still not the tenant that caused the charge. At least, that's the way I see it.
Lastly, is the take away. I don't rent to young people who's parents are involved. Those similar situations I've mentioned? Guess who paid the rent for them. Yup.... the parents. When the tenant cannot pay their own rent, thinking that they are going to take care of the place or stay on top of communications will never work in my opinion. So (and I heard this from another investor a long time ago) never rent to someone who's parents are along making the decision. That being said, I'm sure there are exceptions if you are in a collage town... but that's not my thing.