In my state, that would include things like court records, criminal convictions, sex offender registration, etc. 

All of the details were there; toenails, fingernails, nostrils, sex organs and so forth.

I think you owe your client - especially those who are new to real estate - the duty to help them find the house that is right for them, whether it be traditional sale,Unless you are voilating Fair Housing Laws (Descrimination based on: race, color, religion, sex, handicap, familial status, and national origin; blockbusting; steering), I don't see any legal obligation to show a property or obligation to do business with a potential client.

The tenant has been registered as a sex offender for 30 years. 

It allows you to go to that area and get to know the area before you hire a U-Haul.

Honestly the guy being a racist would probably be the thing I paid the least attention to in this situation.But sex offenders, thieves and drug dealers don't tend to advertise that in front of their house.

Then under that, I have, "Conrad Rentals, LLC does not discriminate based on race, color, national origin, religion, sex, familial status (including children under the age of 18 living with parents or legal custodians, pregnant women, and people securing custody of children under the age of 18), and disability." 

Our stated criteria:Our Criteria:We do not deny housing for race, color, religion, sex, national origin, handicap, sexual orientation, marital status, or familial status.We do deny housing to individuals: when the application is not complete or accurate where there is no sufficient income/resources to pay rent and livewhere there is poor prior tenancy: evictions, violations, damage to rental property, poorly handled move outs, amounts are still owing to landlords or utilities.Criminal activity is at our discretion depending on severity, number of convictions, and how long ago.

This just ensures you're not homing a sex offender in an area they should not be in.As for cleaning, I've hosted a good number of MT/LT stays and can honestly say you should require a monthly touch-up clean when pets are involved.

It outlawed: Refusal to sell or rent a dwelling to any person because of race, color, religion, sex, or national origin.Discrimination based on race, color, religion or national origin in the terms, conditions or privilege of the sale or rental of a dwelling.Advertising the sale or rental of a dwelling indicating preference of discrimination based on race, color, religion or national origin.Coercing, threatening, intimidating, or interfering with a person's enjoyment or exercise of housing rights based on discriminatory reasons or retaliating against a person or organization that aids or encourages the exercise or enjoyment of fair housing rights.I'm wondering if NACA borrowers are protected because the discrimination by realtors/sellers is towards NACA not the actual borrower.