Then I called the police and complained about the jackoffs.Then I installed motion-sensing recording cameras both inside and outside and told the jackoffs I would have them arrested if they set foot on the property.Result: Jackoffs moved shortly.

From what I am seeing, I may have to have the town or Police handle this removal as it alleviates a lot legal issues I would have to bare should I do this on my own.  

based on these Homes the US has to be the cheapest place in the industrial world to live.. given police protection shopping health government stability and of course the government may pay all your bills as well

And yes police departments will drop officers by for situations like this to assist in keeping the peace.

Governmental police actions (police powers as to  RE, not the cops raiding the place) work can be stopped for inspections, stop work orders can be given, building permit snafus, all may be beyond the contractor's responsibility, then again, a contractor that screws up can cause a stop work order, so define it "police actions not arising from contractor's negligence or failing to remain in compliance....." 

If some descendant from a previous owner finds he has inherited a portion of your property through a faulty Chain of Title then you will have to adjudicate a settlement that may cost much more than Title Insurance --- a one time fee.If you had Title Insurance in the example above then the Insurance Company would cover your expenses to recover in court or compensate you for the money you paid to buy the property. 

We've had domestic disputes that could have turned very ugly (guy had done time for shooting someone in the face) if we were not there to stop it, call police, etc.

. / @Jeremy BrownThe best advice I can give for where to look / where to not look in Sacramento is to check the local crime history and do a "digital drive by" via Google Maps Street View through the neighborhood.You can check the crime maps by looking here:https://www.communitycrimemap.com/This data comes straight from the Sacramento Police Department.

I interviewed a perspective tenant who is a police officer.

Under the Good Neighbor Next Door (for teachers, police, firefighters, and EMTs) program from HUD, you take on a second "silent" mortgage for the 50% discount off the appraised value, and must OO for 3 years to receive the full discount.