The "due on sale" clause is a non-issue here. 

Out of curiosity would anyone be willing to share any experience with non-paying renters who've vacated the property prematurely?

Given how the housing authority does their rent price determination on individual units, and government ran programs are never beacons of efficient processes, it can go either way.Note, the examples I speak of only relate to C-Class and below areas.

You are quoting old rules.New rules have a calculated period of Qualified vs Non Qualified usage. 

Furthermore, California has a very anti-landlord and anti-real estate investor government that can cause you all sorts of other problems as well. 

In order to comply with SEC regulations, there is no platform to publicly announce your deal to the crowd (both posting on Facebook and publicly announcing it at an event could be construed as a solicitation, which is not permitted under the structure that most sponsors in the group use).

Yes, the government pays the Section 8 rent timely, but more and more tenants are having to pay a portion of their rent.

I did not see that contractor here:http://www.phila.gov/li/Pages/FindLicensedProfessi...And I did not see that contractor here either:https://hicsearch.attorneygeneral.gov/Always a good thing to see that the contractor has registered with the appropriate government department(s),

In my experience that's not actually the case at least in legitimate evictions for non-payment of rent or breach of another part of the lease.  

@Tom OchiengI would reach out to a real estate attorney for specific advice on this situation since you already have one tenant who is being difficult.On a side note, when I have inherited tenants, I have been most successful when I have provided longer non-renewal notices, like 60-90 days, and offered to assist with moving costs.