Don't rent to strippers, hair stylists, or people on disability

[Mike Williams]

Just a tip for you all starting out… Don't rent to strippers, hair stylists, bartenders etc…  If they are in the cash business, they are uncollectable.  You need to find someone with a good job that is not worth leaving because the have a garnishment.  Learned this a long time ago.  A good tenant is going good until they go rogue.  Get your deposit, cleaning fee and water deposit upfront.  Don't let them screw you over in the end - because they will.

Any other 'types' of tenants you don't like to rent to?

[Steve Babiak]

Originally posted by @Ned Carey:

Keep in mind that some jurisdictions do not allow discrimination based on "source of income". It is not common yet but it does exist in some areas. 

Although that is true and is becoming more common as other states and municipalities pass such regulations, you can still require that the income be DOCUMENTED; so a cash occupation would have to be declaring that income for tax purposes - many will be tax evaders and not report all cash received. 

IRS form 4506-T gets used to show a transcript of past tax returns.