Here’s how odor is typically handled on a fire claim by an insurance company.- First option is just washing (degreaser etc.) and thermal fogging.

Also, just my .02 cents, if you are relying on an LLC for liability protection then you are under insured.

Should the listing brokerage have insurance for things like this that they can make a claim on?

How much does it typically cost to insure a multi unit?

I'm looking for any references for a potentially full rewire, full re-plumbing, roofing, foundation, drywall, carpenters and painters.

Owner said it has updated electric and copper plumbing newer forced air furnaces and c/a conditioners and some more updates. 2 of the 6 units are vacant and 3 units are being rented at $900.00/month with one unit being used to house the property manager.

Depending how extensive the fire was, it will probably need all the major stuff like wiring, plumbing above the slab, a/c, flooring, some framing, roof, sheetrock, etc.

Anyone can recommend an insurance agent?

They are on a month to month lease which we have informed them we will not be renewing for a couple reasons, the first being that they are a complete slob and are trashing the place / from the looks of it are the reason the place had bedbugs with the previous owner , the second being that they have dogs that are not covered under my insurance. 

Sure you can sell the home when you retire but will the proceeds of the sale after taxes and broker fees really net you a profit after a down payment and decades of property taxes, debt service, mortgage interest that you can no longer deduct from your federal taxes, repairs and homeowners insurance?