Give them the "Protect Your Family From Lead In Your Home" and "Mold, Moisture and Your Home" booklets that are published by the EPA. 2.

In other words, you must create a financial fortress around your family [assets] so that nothing can penetrate it.Robert G AllenBe such a powerful steward over your forest of money trees that they can produce fruit to feed generations of people long after you have gone.Robert G AllenDon’t spend so much time accumulating assets and income streams that you neglect the most important relationships in your life.

Please advise.It would help if we saw pictures of what you are considering.Metal is probably best because it won't dry rot from moisture or contact with the ground and animals can't chew/scratch through it.Any general contractor or a good handyman should be able to help you with this project.

Also, an Air conditioner will work more efficiently if there is less moisture in the air (Houston, Florida, Alabama, etc).  

They can also be a liability however if there is a moisture problem that cannot be easily solved.

Expect the tar from the nicotine to penetrate into the HVAC system, electrical outlets and smoke detectors, seep into the walls and woodwork, seep into floor coverings and window coverings, and seep into cabinets.

Be sure to hit all major plumbing penetrations and all top plates (the part in the attic where the framing material from the walls meets the attic air plane).

I informed them that the reason mold keeps reappearing is because of the moisture in the room when showering.  

Tenant agrees to allow Landlord timely access to premises to do maintenance and repair.Tenant will notify Landlord in a timely manner of any damages or problems as they arise, including damages caused by Tenant, malfunction of appliances or fixtures, and water/moisture leaks and spots.Tenant will take care of the premises, keeping them clean and clear of debris.

I would suggest having trench-less sewer lateral work done.Roots will continue to grow into the pipes since that is the best source of nutrients.Roots will grab toilet paper and anything that probably should not have been flushed down the toilet.The trench-less solution is a pvc type sleeve that will coat the inside of the pipe that roots cannot penetrate.