The realtor made several derogatory remarks about their culture, such as "This house will be good enough for them because they're used to living in huts." 

I wont return until after 5 months so if I don't get to rent it out right away I will at minimum loose out 6 weeks.The house is kept in a good enough condition to show. 

Just wondering if that might be good enough? 

Well, your screening process and judgment needs to be good enough to go on a one year lease. 

Serviceman adjusted dampers and vents (as I instructed tenant to do)....charged $180 (silly tradesmen and yuppies)....tenant was good enough to realize it was his own doing, so he picked up the bill.

This is usually a good enough empty threat to get people out.Good luck and hope your father in law gets better.

Credit was good enough to be approved by the condo association (over 625 at least).

It seems like this would be good enough to show you acted in good faith.  

I can understand the wariness of the cash only income, but I'm getting the vibe from you that you don't think these people are good enough because they're hairdressers, strippers, or disabled. 

If the property is good enough to make the offer write it up otherwise you have nothing to suggest you are a serious buyer.