You should make sure that "return" ductwork gets included, and not just "supply" ductwork.

The fact is there is an increasing supply of distressed property as well as unemployment, lack of financing, etc., for there to be any basis for appreciation anytime soon.

Between water supply and boiler system, 7 burst pipes and one cracked radiator.

That means the air coming from the rest of the house contains the dirt you are seeing (just for you to understand the source).There is some national body that deals with ductwork cleaning; they recommend that ducts be cleaned (both return and supply ducts) every 4 years or more frequently.Have the ducts been cleaned within last 4 years?

Long story story short supply went high demand went low.

SFR's are harder to control as they are more spread out.Taxes and maintenance tend to be higher on a per unit basis compared to multifamily 5 units or more.The Dallas market is healthier than many other parts of the country.With SFR's the renter usually gets more space for the money.Also the SFR will usually appreciate at a higher clip per unit once the economy turns around versus multifamily 5 or more.If there is low housing supply and permits for new builds versus more demand for housing then rents will go up.I believe many potential tenants don't see purchasing a house as a smart move in some markets so they just want to rent and let someone else handle the upkeep.I would just make sure that as inflation and commodity cost rises that your SFR are not to far away from the core.There will be in the future a wave of more intown living to reduce waste and cost of living since wages have pretty much remained stagnant.

I have some units I supply heat and I set the thermostat to 68 degrees.

They are sold and your big box store or local plumbing supply house.

The waves are dictated by contractions and expansions in supply and demand.

‎16394 Homes on the market48% are shortsales20% are REO/Foreclosures32% Other(presumed regular sales)1171 Went into escrow last week41% shortsales41% REO/Foreclosures18% OtherBy these numbers we have a 14 week supply of homes on the market(take homes on the market divide by homes that went into escrow last week)just to keep you guys updated on whats happening in vegas, If you have any questions on Vegas let me know