Also, I've bought from landlords who are fed up with being landlords because of the terrible tenants.

One thing I was thinking about recently regarding this matter is that even though some areas may be terrible, someone has to live there.

So many lawns were just terrible.

So, the 3 "pillars" of REI marketing work well here:1) We pay CASH2) We do it FAST3) With NO REPAIRSYou can add a little "flavor" to the message for absentees by saying things like "Are TERRIBLE TENANTS or a VACANT HOUSE a financial DRAIN?"

I have purchased HUD homes that were in terrible condition and I found this out by inspecting the property first with a realtor.  

Some were nice, some were terrible.  

The water pressure is terrible and I suspect that the pipes are part of the problem.

According to zillow (which isn't terribly accurate) it is now worth about 1.43M. 

The floors were terrible, porcelain tile over cement board.  

That person could either be a terrible tenant or maybe even worse, doesn't get along with the others and causes a couple of them to leave.If you have the parents on the lease, I would start with the tenant who moved out.