Best to cover all your basis, this may be a health concern. 

In Beyond Pricing have what they call a health score that helps you to gauge the performance of your unit.

If it's taking time, or if there are/were potential health risks involved, the tenant has a point. 

Non-qualified period can be ignored if the period of temporary absence (not to exceed an aggregate of two years) is due to change of employment, health conditions, or such other unforeseen circumstances as may be specified by the IRS.

Here is what the law says:- If the disability is not apparent, then the landlord can ask for written proof from a health care provider who must be licenced in the state.

The couple both have health issues and are both on disability. 

Maybe if it was some jerk or criminal I'd go after it, but if she has mental health issues it probably would be more trouble than it's worth.

Extra credit if you can owner-finance it.The last thing I'll say also echoes one of Steve's points: when the market is "up," flips are better because it's a seller's market; when the market is "down," rentals are better because it's a buyer's market.Here's the link to the Greater Houston Partnership's latest Economy At A Glance for anyone interested in the actual data surrounding the health of the Houston economy: http://www.houston.org/pdf/research/quickview/Economy_at_a_Glance.pdf

NOTICE: If Landlord fails to repair a condition that materially affects the physical health or safety of an ordinary tenant as required by this lease or the Property Code, Tenant may be entitled to exercise remedies under §92.056 and §92.0561 of the Property Code.span>If Tenant follows the procedures under those sections, the following remedies may be available to Tenant: (1) terminate the lease and obtain an appropriate refund under §92.056(f); (2) have the condition repaired or remedied according to §92.0561; (3) deduct from the rent the cost of the repair or remedy according to §92.0561; and (4) obtain judicial remedies according to §92.0563.

This might be the wrong group to ask, but I wanted to ask what many of you self employed real estate pros are doing for health insurance?