I may seem overly cautious, but in City of Los Angeles, CA, to do what you want may potentially require any or all of the following (even for month-to-month tenants):Evicting the most recent tenant through a special processResiding in the unit for at least 2 yearsA minimum of $7,900 in relocation assistanceNot being able to evict anyone if all tenants are "protected" (10+ years in unit and 62+ years old or disabled)And of course there are more details

Things may not really be the way she says, but she's never been open to me about finances so I'm sure there are a lot of details she's not giving up.I do believe that she hasn't made payments because she's on disability and could not possibly be making the mortgage payments on her own.If we were to figure out how much she owes the bank how could we learn it without alerting the bank yet?

From what I observe the middle class jobs I recall as kid have been replaced with crap like disability, restaurants, part time odds and ends.  

Upstairs - so they don't have to hear anyone above them (really important to a lot of tenants), first floor unit (older tenants, especially, love them, also better for disabled) has hardwood floors (tenants love them), is a corner unit (so fewer neighbors, more windows), closer to the parking lot (important to tenants) - market it with anything that's unique or better about your unit.

They are not a protected class.Here are your protected classes per federal law:The FHA, to date, includes seven protected classes: race, color, religion, national origin, sex, disability, and familial status.http://www.nolo.com/legal-encyclopedia/the-fair-ho...Colorado's list of protected classes is:Protected classes in housing include: Race, Color, Religion, Creed, National Origin/Ancestry, Sex, Disability/Handicap, Sexual Orientation (including Transgender Status), Marital Status, and Familial Status (children under the age of 18 in the household).https://www.colorado.gov/pacific/dora/civil-rights... 

She is living month to month and living off of disability.

If they can't afford your unit, they need to move.And know, that I am now a disabled senior in subsidized housing, but my rent always gets paid first.  

The only problem is that she is disabled, i.e blind.

I am betting that this person has a large disability payment they recently received as back pay from Social Security, and that they aren't technically "retired," but rather disabled and don't want to say so.  

My husband and myself will live there part-time as we help take care of my developmentally disabled sister and it's actually closer to both our jobs.Thanks so much.