When choosing a pest control company, you have to weigh which factors are most important to you. If you want extensive coverage with emergency availability, and technicians that are not rushing the job, you shouldn’t just go with the lowest bidder.
Since the difficulty of scheduling a pest control treatment is largely based on physically getting the technicians to the site, a local company is much more likely to be available should you need an emergency treatment, or have limited availability.
Make sure you understand how the work is warrantied - which pests are covered, is there a minimum waiting period after the treatment and so on. For a commercial building, an inspection will likely be needed, which also affords a good opportunity to set out what the scope of the service will be.