Used to be asbestos and formaldehyde now it's mold.

Conversely regular, long term exposure to small amounts may be the cause of respiratory issues years later - that is what the investigation to which I referred in my prior post above is examining.No one here is telling you that you must remove the asbestos from your buildings, but you do have to disclose its presence when you sell and the day is coming when you will likely have to disclose it to your tenants.Once again, I am advocating that landlords and rehabbers educate themselves and continue to keep there knowledge current as our understanding of the impacts of long-term exposure to asbestos, just the same as you would with other hazards in the built environment such as lead, mould, PHPs, formaldehyde, etc. 

The smoke has formaldehyde, cyanide and arsenic in it plus 599 other chemicals.We have freedom in the US, even freedom to not be smart.

So they kind of fall in no man's land in Texas right now.Some of the trailers had issues with formaldehyde fumes and allergic reactions.There were a lot of these that were sold at auction in Texas in the last year.

They have a class action lawsuit for elevated formaldehyde levels.

As you reach back in time there will be materials and technologies used that have since been found to be harmful (lead, asbestos, formaldehyde, etc).

My guess is most make a great profit off of rentals from 1969 that have single pane windows,  2" of insulation full of formaldehyde and rat droppings, leaky water fixtures with 10 gallons per flush, asbestos, radon, 80% furnaces and water heaters and windows with lead paint on them... oh but I gave the tenant the brochure so they're good... plus I put in an ikea kitchen in the unit so it looks cool.

Don't purchase anything older than a home built from June 15,, 1976 or before and even then be very careful about investing in any MH built in even the late 70's as many used a number of caustic (formaldehyde) and carcinogenic (asbestos) chemicals and substances until the laws changed in '79-'80.Additionally, if the home has ever been moved from it's original situs (one site to another except from the manufacturers and/or dealers retail lot) as conventional financing would be very difficult to come by.

Possibly the mold came with the bamboo and there may be financial claims you can file in that direction.This class action lawsuit is for splitting, not mold, but it will give you an idea :  http://www.classactionsreporter.com/consumer/lumbe...I know there is another one for formaldehyde from China bamboo.  

An ozone generator should never be operated in occupied spaces, and the area should be adequately vented before people or animals are allowed to re-enter.According to a report produced by the EPA, ozone generators are ineffective at reducing levels of formaldehyde and carbon monoxide, despite claims by manufacturers.