Let's see what her next exacerbation is going to be, after she put out dangerous chemicals that can hurt the tenant's child and dog. 

What other hidden dangers are out there? 

My brother and I are currently have a contract to purchase a triplex in our area for $134k.  We are planning on doing conventional financing at 75% LTV which makes our down payment and closing amount around $40k.  Ori...

Are there any dangers/risks I'm not seeing?

The eviction process is a very emotional and dangerous time as it is, but especially so to someone who is new.  

She might be a danger to herself and your property.

My lease specifically states:5) UseThe stated premises shall be used only as a family residence and no business activity whatsoever is allowed including babysitting – childcare and the lessee shall not permit said premises or any part thereof to be used for (a) the conduct of any offensive, noisy or dangerous activities that would increase the premiums for fire insurance on said premises; (b) the creation or maintenance of a public nuisance; (c) anything which is unlawful or in violation of any public authority at any time during the term of this lease; or (d) any purpose or manner which will obstruct, interfere with, or infringe upon the rights of adjacent properties.

I don't have links for you but I like to think I'm a primary source here.Oil prices are dropping because no one wants (read Saudi Arabia) to hold back production for the rest of the world to do well so we are in a dangerous game of chicken that will at best end with someone flinching but at worst end with bankrupt governments or shuttering of several O&G companies if we sustain low oil prices for more than 1 year. 

Responding to Problem Tenants The Fair Housing Act does not protect tenants who are unruly or who pose a danger to other residents.

It usually makes people more dangerous because they will take on things that they have no clue how to do...#4 - Good luck.