The duplex has doubled in value over four years, so the pain was not that bad; and it is in a 1031xWalk with the inspector and go into every unit, garages, laundry areas-the works.

Save the picture from facebook in case the chair disappears so you have evidence they were in control of it.

With BRRRR and financing the 10k over 30 years, the short term pain is relatively low, and the overall long term gains can be substantial. 

I went through a painfully expensive rehab but it is now more or less up to speed and fully rented out with each of the two units collecting $3k a piece monthly for a total of $6k each month.  

The most common pain point anyone in probate has is "what do I do with all of this stuff".

@John Gerwatosky, how big of a pain is this worth to you? 

So although this can be a pain, I do recommend getting them to protect yourself. 

Or it can be a pain to even go see the property, sometimes landlords don't make themselves available for showings or they are willing to wait for a tenant that meets their high criteria.

Active, smaller investors it presents a lot of challenges and I believe few will do well (or experience a lot of pain getting there). 

The reason for this, as @Rick Baggenstoss pointed out, is that accepting Section 8 vouchers requires that a landlord submit to a painful bureaucratic approval and inspection process that all but guarantees a month or more of vacancy at the start of each lease.