What are my rights in nj,can a seller put me all threw this and refused a closing ,what about my time and money I spent  for appraisals and inspection ,I gave notice to move,if I stay they want more rent, inconvenience to my family

The ask of $650k is actually closer to a realistic ARV and not the current state of the building.

Two SFRs and a duplex, all negotiated, inspected, financed, and closed from out of state.

Is Building Inspection people know of any known problems? 

You could also AirBnB rooms out of your home if you wanted a SFR closer in to central Austin.

An inspection found old insulation in attic that needs to be replaced. 

This is the further expanded category of Fixed Cost that I was referring to:Purchase Cost- Inspection Costs- Closing Costs- Lender FeesHolding Cost- Mortgage Payments- Property Taxes- Utilities- InsuranceSelling Cost- Commissions- Closing Cost- Home warranty- Termite Letter- MLS Fees

If possible, I strongly suggest you look a little closer to home. 

@Jack Edward Johnson always do an inspection

BP,     My wife and I are going through our inspection report for a two family we have an accepted offer on and the inspector noticed that there are black soot like heat streaks staining above the baseboard heat in the bedroom and living room of rental unit.