Pumps are about $1,000 installed, and a treatment system will range from $500-$2,000.

Not a big deal, we agreed to escrow the treatment cost.

The requirement to qualify for 1031 Exchange treatment is not the amount/minimum amount of time that you hold the property (such as two years as you mentioned), but actually your INTENT to hold the property for rental, investment or business use. 

Property that qualifies for 1031 treatment is property that you have purchased with the intent to use for productive use in business trade or investment.  

Get a Grub treatment in the spring.

Had the mold-inspector perform a pre-treatment inspection, review the cleaning procedure with my contractor and take initial samples.

The property is really treated as inventory in your real estate business rather than investment property as required for 1031 Exchange treatment.

Our pest guy was confident that if you catch bit early, pesticides will wipe them out in one or two treatments and heat is generally an unnecessarily-expensive way to handle them.There's no way I'd pay for treatment AND let them out of their lease.

There are treatments available that will kill the roots, but, as you noted, damage is already done.

A professional mold treatment company will know the drill and be able to advice you on what needs to be done.John Corey