Dirt Basement for Duplex

[Hector Vazquez]

All, 

I am about to get into a duplex for a rent and hold. Its a pretty old duplex (1890) and has a dirt basement. I am not new to old houses, but I am to dirt basements. I generally try to stay away from basements, unless i have a very good deal. Given that it is an old style dirt basement, is there anything i need to be in the look out that i would normally not be in the look out for a regular basement?

My research has led me to believe that the number one issue is for mold and humidity, as it seems they are more prone to it. If that is the case, is there a way do water proof a dirt basement? if so, what is the ball park cost?

thank you in advance for any help. 

Thanks,

Hector