However many people treat the area where the termites are seen and not always the whole house, so if it was just a spot treatment, then they might come back somewhere else. 

Property that qualifies for 1031 treatment is property you purchased with the intent of holding for productive investment use (not fix n flip). 

But you probably do and that is the bank in the form of mortgage payments, you must create standardized policies and procedures and MOST IMPORTANTLY  you have to treat all tenants the same or you can be involved in a possible fair housing or discrimination suit by some other tenant that did not get the special treatment.