Most Certified Contractors have been in business for many years. Their experience will enable them to install a top quality system on your property that inexperienced contractors simply cannot provide. They know how the TORO irrigation equipment works, how to install it, and how to fine tune it to meet your needs. Always ask every contractor who works on your property for proof of both types of insurance. Has passed a test of irrigation knowledge.
Price is always a major determining factor for any contracted work.
When you pay too little, you sometimes lose everything, because what you bought was incapable of doing what it was bought to do. If you deal with the lowest bidder it is well to add something for the risk you run. And if you do that, you will have enough to pay for something better. Protect yourself and get the best equipment and installation available at a competitive price. You will also find links to these contractor's web pages.