Treat people like you'd want to be treated if you were in their shoes. 

I can't provide any advice as I have never been in your shoes, but it sounds like you and your brother should be able to evict her with enough proof of what is happening.

If I were in your shoes, I would at the very least advise the tenant (via phone or letter) to reach out to his/her social worker ASAP for help on finding new housing.

I'm in your same shoes where I have a multifamily and  I see the tenants doing so many wrong things that I clean up because it is little.

Were I in your shoes, I would order a certified home inspection to ensure you know all the items that will end up costing you money.

It means the tenant has the right to not have the landlord interfere unreasonably in their possession of the home while they are renting it, their right to quietly enjoy the property without the landlord's interference.I think landlords forget to put themselves into the shoes of a renter. 

That said, many brokers or sellers might negotiate a discount so if I were in your shoes I’d absolutely ask.

We need health to create wealth.Good pair of safety glassesVoltage detectorGlovesDust maskSteel toe shoes, saved my toes a couple of timesEar plugsHard hat for attic work

It's a start to acknowledge I have never walked in the shoes of a homeless person - I wasn't raised by my abusive uncle on the Pine Ridge reservation, I've never been a war vet suffering from PTSD, and I don't understand what its like to have down syndrome or schizophrenia. 

I would try to house hack if I were in your shoes.