Filthy vermin infested housing full of broken appliances.

Even SEC 8 tenants don’t want to live in gang infested zones.

I spoke to a few termite inspectors and was told that properties should be fumigated once every 7-10 years, and up to 15 years if treated with material that remains and reduces termite infestation in the years after fumigation.

I'd still get title insurance though...I'd wonder why they are selling it for less than they paid and still below market rate.Maybe the 2019 sell was a foreclosure and the neighborhood changed and now it is not worth as much.Maybe the house was in a fire or mold infested, or a meth lab--something that has major rehab costs, so it is worth less than the neighboring properties.Maybe the sell is just a scam.I'd wonder though if there is some sort of issue with the occupant--lifetime estate--big bad boys with guns and not afraid of using them--the local Sherriff's kid--one that will burn the place before they move--unusual deaths in the house--something.There is a reason for the low price. 

I need to contact the district PD still.I agree with what you said @Nathan G. about trying to follow all the social distancing guidelines and had my one tenant, not been moving out May, I would probably just let it be but there's some urgency now that I'll be losing $700/month on that tenant's room and even though I know people who need rooms, I don't think anyone is going to rent a room from a home when you open the front door, it smells like a dump.Do either of you know that if my tenant moving out states that my disgusting tenant across the hall is the reason he's moving out due to unsanitary living conditions, garbage in the common areas left by the disgusting tenant, and fear for pest infestation/mold pileup from hoarding of garbage in the disgusting tenant's room as well as expired food left in the refrigerator, would there be any recourse for me to sue the disgusting tenant for that $700/month I'm losing because of him being the reason the other tenant moving out?

Have you already performed a mold test to assess the current level of infestation?

It is now 1.5 yrs later and they have reported bed bug infestation.

I put 1000 down for the mobile home it cost 6000. my friend went to see it he said it was flea infested.

There seems to be an ant Infestation. 

and they spilled the beans rather accidentally that they had rat infestation in their previous house and they are very well aware how it "looks".