Like no joke, walls, ceiling, tile ground, cabinets, everything was smoke stained yellow.

Smoke and fire are probably the same thing descriptively to the tenant and popping bulbs sometimes smoke.

Everything looks like its in excellent condition (no damage, visible mold, smoked units, etc). 2BR/1B for the main floor and 1BR/1B upstairs.

Disclaimer: I am not a professional plumber.If it's an electric water heater, this doesn't apply.If it's a gas water heater... do you have a sufficient supply of combustion air to the closet you made?

And so, the sale price may be higher than fall or winter season due to supply and demand.  

When the high end motels have 10-12 cars, I should have another 4 to 5 houses rented.Cheap motel is $350/week for a room with 2 beds.High end motel is $600/week for a room with 2 beds and breakfast, pool, gym, etc.I charge $400/week for a house with 2 beds, washer/dryer, kitchen with all appliances, cable/wifi, plus all consumable supplies.

(A) A landlord who is a party to a rental agreement shall do all of the following:(1) Comply with the requirements of all applicable building, housing, health, and safety codes that materially affect health and safety;(2) Make all repairs and do whatever is reasonably necessary to put and keep the premises in a fit and habitable condition;(3) Keep all common areas of the premises in a safe and sanitary condition;(4) Maintain in good and safe working order and condition all electrical, plumbing, sanitary, heating, ventilating, and air conditioning fixtures and appliances, and elevators, supplied or required to be supplied by the landlord;(5) When the landlord is a party to any rental agreements that cover four or more dwelling units in the same structure, provide and maintain appropriate receptacles for the removal of ashes, garbage, rubbish, and other waste incidental to the occupancy of a dwelling unit, and arrange for their removal;(6) Supply running water, reasonable amounts of hot water, and reasonable heat at all times, except where the building that includes the dwelling unit is not required by law to be equipped for that purpose, or the dwelling unit is so constructed that heat or hot water is generated by an installation within the exclusive control of the tenant and supplied by a direct public utility connection;(7) Not abuse the right of access conferred by division (B) of section 5321.05 of the Revised Code;(8) Except in the case of emergency or if it is impracticable to do so, give the tenant reasonable notice of the landlord's intent to enter and enter only at reasonable times.

We definitely have some smoke damage so we'll need to do something, 

Real estate is a play on housing supply & demand, as well as population & job growth, whereas precious metals are a play on rising inflation and lack of confidence, as well as global commodity demand. 

Is that currently supplied by the furnaces?